40 ( number ) - wikipedia 40 ( number ) This article is about the number. For other uses, see Forty ( disambiguation ). ← 39 40 41 → ← 40 41 42 43 44 45 46 47 48 49 → List of numbers -- Integers ← 0 10 20 30 40 50 60 70 80 90 → Cardinal forty Ordinal 40th ( fortieth ) Numeral system quadragesimal Factorization 2 × 5 Divisors 1, 2, 4, 5, 8, 10, 20, 40 Greek numeral Μ  ́ Roman numeral XL Latin prefix quadrage - Binary 101000 Ternary 1111 Quaternary 220 Quinary 130 Senary 104 Octal 50 Duodecimal 34 Hexadecimal 28 Vigesimal 20 Base 36 14 40 ( forty ) is the natural number following 39 and preceding 41. Though the word is related to `` four '' ( 4 ), the spelling `` forty '' replaced `` fourty '' in the course of the 17th century and is now the standard form. Contents 1 In mathematics 2 In science 2.1 Astronomy 3 In religion 3.1 Judaism 3.2 Christianity 3.3 Islam 3.4 Yazidism 3.5 Funerary customs 3.6 Hinduism 3.7 Sumerian 4 In entertainment 5 In sports 6 In other fields 7 References 8 External links In mathematics Forty is a composite number, an octagonal number, and as the sum of the first four pentagonal numbers, it is a pentagonal pyramidal number. Adding up some subsets of its divisors ( e.g., 1, 4, 5, 10 and 20 ) gives 40, hence 40 is a semiperfect number. Given 40, the Mertens function returns 0. 40 is the smallest number n with exactly 9 solutions to the equation φ ( x ) = n. Forty is the number of n - queens problem solutions for n = 7. 40 is a repdigit in base 3 ( 1111, i.e. 3 + 3 + 3 + 3 ) and a Harshad number in base 10. In science The atomic number of zirconium. Negative forty is the unique temperature at which the Fahrenheit and Celsius scales correspond ; that is, − 40 ° F = − 40 ° C. It is referred to as either `` minus forty '' or `` forty below ''. Astronomy Messier object M40, a magnitude 9.0 double star in the constellation Ursa Major The New General Catalogue object NGC 40, a magnitude 12.4 planetary nebula in the constellation Cepheus In religion The number 40 is used in Jewish, Christian, Islamic, and other Middle Eastern traditions to represent a large, approximate number, similar to `` umpteen ''. Judaism In the Hebrew Bible, forty is often used for time periods, forty days or forty years, which separate `` two distinct epochs ''. Rain fell for `` forty days and forty nights '' during the Flood. ( Genesis 7 : 4 ) Spies were sent by Moses to explore the land of Canaan ( promised to the children of Israel ) for `` forty days. '' ( Numbers 13 : 2, 25 ) The Hebrew people lived in the lands outside of the promised land for `` forty years ''. This period of years represents the time it takes for a new generation to arise. ( Numbers 32 : 13 ) Several Jewish leaders and kings are said to have ruled for `` forty years '', that is, a generation. Examples include Eli ( 1 Samuel 4 : 18 ), Saul ( Acts 13 : 21 ), David ( 2 Samuel 5 : 4 ), and Solomon ( 1 Kings 11 : 42 ). Goliath challenged the Israelites twice a day for forty days before David defeated him. ( 1 Samuel 17 : 16 ) Moses spent three consecutive periods of `` forty days and forty nights '' on Mount Sinai : He went up on the seventh day of Sivan, after God gave the Torah to the Jewish people, in order to learn the Torah from God, and came down on the seventeenth day of Tammuz, when he saw the Jews worshiping the Golden Calf and broke the tablets. ( Deuteronomy 9 : 11 ) He went up on the eighteenth day of Tammuz to beg forgiveness for the people 's sin and came down without God 's atonement on the twenty - ninth day of Av. ( Deuteronomy 9 : 25 ) He went up on the first day of Elul and came down on the tenth day of Tishrei, the first Yom Kippur, with God 's atonement. ( Deuteronomy 10 : 10 ) A mikvah consists of 40 se'ah ( approximately 200 gallons ) of water The prophet Elijah had to walk 40 days and 40 nights before arriving to mount Horeb ( 1 Kings 19 : 8 ) 40 lashes is one of the punishments meted out by the Sanhedrin ( Deuteronomy 25 : 3 ), though in actual practice only 39 lashes were administered. Biblical verse Numbers 14 : 33 - 34 alludes to the same with ties to the prophecy in The Book of Daniel. `` For forty years -- one year for each of the forty days you explored the land -- you will suffer for your sins and know what it is like to have me against you. ' '' One of the prerequisites for a man to study Kabbalah is that he is forty years old. `` The registering of these men was carried on cruelly, zealously, assiduously, from the rising of the sun to its going down, and was not brought to an end in forty days '' - ( 3 Maccabees 4 : 15 ) Christianity Christianity similarly uses forty to designate important time periods. Before his temptation, Jesus fasted `` forty days and forty nights '' in the Judean desert. ( Matthew 4 : 2, Mark 1 : 13, Luke 4 : 2 ) Forty days was the period from the resurrection of Jesus to the ascension of Jesus. ( Acts 1 : 3 ) According to Stephen, Moses ' life is divided into three 40 - year segments, separated by his growing to adulthood, fleeing from Egypt, and his return to lead his people out. ( Acts 7 : 23, 30, 36 ) In modern Christian practice, Lent consists of the 40 days preceding Easter. In much of Western Christianity, Sundays are excluded from the count ; in Eastern Christianity, Sundays are included. The Forty Martyrs of Sebaste Kirk Kilisse, `` Forty Churches '' ( Σαράντα Εκκλησιές ) in Eastern Thrace Rain fell for `` forty days and forty nights '' during the Flood. ( Genesis 7 : 4 ) Islam Muhammad was forty years old when he first received the revelation delivered by the archangel Gabriel. Masih ad - Dajjal roams around the Earth in forty days, the first day length is like one year, the second day is like one month, the third day is like one week and the next day ( until 40th day ) is like one day. God forbade the Fasiqun ( the non-believers ) from entering the Holy Land for 40 years to separate them from Musa ( Moses ) and his brother. Musa ( Moses ) spent 40 days on Mount Sinai where he received the 10 commandments. On the 40th verse ( ayat ) of the 2nd chapter of the Quran ( Al - Baqarah ) God changes the topic. Forty was the number of days that Prophet Ilyas ( Elijah ) spent in the wilderness before the angel appeared to him with God 's message on Mount Horeb. Forty was the number of days that Prophet Isa ( Jesus ) was tempted in the desert by Satan. Muhammad praying and fasting in the cave for 40 days. Muhammad then had 40 followers to spread the religion of Islam. Prophets Dawuud and Suleiman each ruled for forty years. Regarding the flood that Noah encountered, it is said that for forty days water continued to pour from the heavens and to stream out over the earth. Yazidism In the Yazidi faith, The Chermera Temple ( meaning `` 40 Men '' in the Yazidi dialect ) is so old that no one remembers how it came to have that name but it is believed to derive from the burial of 40 men on the mountaintop site. Funerary customs Some Russians believe that ghosts of the dead linger at the site of their death for forty days. Many Christian Filipinos mark the end of the initial mourning period on the fortieth day after death, and have a Mass said. They believe that the soul remains on the earthly plane for forty days before entering the afterlife, recalling how Christ ascended to heaven forty days after his Resurrection. Hinduism In Hinduism, some popular religious prayers consist of forty shlokas or dohas ( couplets, stanzas ). The most common being the Hanuman Chalisa ( chaalis is the Hindi term for 40 ). In the Hindu system some of the popular fasting periods consist 40 days and is called the period One ' Mandl kal ' Kal means a period and Mandal kal means a period of 40 days. For example, the devotees of ' Swami Ayyappa ', the name of a Hindu God very popular in Kerala, India ( Sabarimala Swami Ayyappan ) strictly observed forty days fasting and visit ( Only male devotees are permitted to enter into the God 's Temple ) with their holy submittance or offerings on 41st or a convenient day after a minimum 40 days practice of fasting. The offering is called ' Kanikka '. Sumerian Enki ( / ˈɛŋki / ) or Enkil ( Sumerian : dEN.KI ( G ) 𒂗𒆠 ) is a god in Sumerian mythology, later known as Ea in Akkadian and Babylonian mythology. He was originally patron god of the city of Eridu, but later the influence of his cult spread throughout Mesopotamia and to the Canaanites, Hittites and Hurrians. He was the deity of crafts ( gašam ) ; mischief ; water, seawater, lake water ( a, aba, ab ), intelligence ( gestú, literally `` ear '' ) and creation ( Nudimmud : nu, likeness, dim mud, make bear ). He was associated with the southern band of constellations called stars of Ea, but also with the constellation AŠ - IKU, the Field ( Square of Pegasus ). Beginning around the second millennium BCE, he was sometimes referred to in writing by the numeric ideogram for `` 40, '' occasionally referred to as his `` sacred number. '' A large number of myths about Enki have been collected from many sites, stretching from Southern Iraq to the Levantine coast. He figures in the earliest extant cuneiform inscriptions throughout the region and was prominent from the third millennium down to Hellenistic times. The exact meaning of his name is uncertain : the common translation is `` Lord of the Earth '' : the Sumerian en is translated as a title equivalent to `` lord '' ; it was originally a title given to the High Priest ; ki means `` earth '' ; but there are theories that ki in this name has another origin, possibly kig of unknown meaning, or kur meaning `` mound ''. The name Ea is allegedly Hurrian in origin while others claim that it is possibly of Semitic origin and may be a derivation from the West - Semitic root * hyy meaning `` life '' in this case used for `` spring '', `` running water. '' In Sumerian E-A means `` the house of water '', and it has been suggested that this was originally the name for the shrine to the God at Eridu. In entertainment The number on the logo for the American - Japanese hard rock band Crush 40. a song by Dave Matthews Band `` 40 '', a 1983 song by U2 from their album War, whose lyrics are a modification of Psalm 40 `` 40 '' is the title of a song by Franz Ferdinand the American - Japanese hard rock band Crush 40 featured in Sega 's Sonic the Hedgehog franchise with guitarist Jun Senoue and vocalist Johnny Gioeli the highest number ever counted to on Sesame Street the number of positions on several radio countdown programs, notably American Top 40, American Country Countdown, and Rick Dees ' Weekly Top 40 In The Early Show segment `` Chef on a Shoestring '', chefs are given a $40 budget. Canadian hip hop producer Noah Shebib is known as `` 40 ''. Forty Shades of Green, a song about Ireland, was written and recorded by Johnny Cash in 1961. Fortycoats & Co. was an Irish children 's TV drama series of the 1980s ; the name is based on the nickname of a Dublin tramp, Johnny Fortycoats, of the 1930s. In sports In baseball, each team in Major League Baseball is allowed to have 40 players under major - league contracts at any given time ( not including players on the 60 - day disabled list ). From September 1 to the end of the regular season, teams are allowed to expand their game - day rosters to include the entire 40 - man roster. In horse racing, the maximum permitted number of runners in the Grand National is 40. The 40 - yard dash is an important metric in American football scouting. In tennis, the number 40 represents the third point gained in a game. A score of 40 - 40 ( three points each ) is called `` deuce '', at which time a player must score two consecutive points to win the game. Beginning with the 2013 season, the number of cars that will run each race in NASCAR 's second - level Nationwide Series. And effective with the 2016 season, it is the maximum number of participating cars in each Monster Energy NASCAR Cup Series race. In other fields Forty is also : in the saying `` Life begins at forty '' in the expression `` forty winks '', meaning a short sleep in the trademark name of the penetrating oil and water - displacing spray WD - 40 ; `` WD - 40 '' is an abbreviation of `` Water Displacement, 40th formula ''. the caliber of the bullet in a number of firearms cartridges, most notably the. 40 S&W. ( The 10mm Auto, although designated as metric caliber, uses the same caliber, and often uses the same bullets. ) the number of years of marriage celebrated by the ruby wedding anniversary the code for direct dial international phone calls to Romania the number in the designation of : Interstate 40, a freeway that runs from California to North Carolina U.S. Route 40, the 2,285 - mile ( 3,677 km ) highway that runs from Baltimore, Maryland, to Park City, Utah, a portion of which follows the National Road European route E40 from Calais to Ridder the A40 and M40, important highways in the UK. The A40 is a trunk road in England and Wales, connecting London to Fishguard. The M40 motorway is the second motorway in the British transport network to connect London to Birmingham the number of spaces in a standard Monopoly game board the number of thieves in Ali Baba and the Forty Thieves and in Ali Shar and Zumurrud, from Thousand and One Nights ( both the numbers 40 and 1001 are more likely to mean `` many '' than to indicate a specific number ) the customary number of hours in a regular workweek in some Western countries the number of weeks for an average term of pregnancy, counting from the woman 's last menstrual period a 40 - ounce bottle of malt liquor, referenced in the song `` 40oz. to Freedom '' by Sublime The Tessarakonteres, or 40, the largest ship of antiquity, constructed by Ptolemy IV Forty is the only integer whose English name has its letters in alphabetical order. Forty Foot, a promontory on the southern tip of Dublin Bay, Ireland, from which people have been swimming in the Irish Sea all year round for some 250 years After the Civil War, there were plans to offer freed slaves 40 acres and a mule. To understand a people, you must live among them for 40 days. ~ Arabic proverb Quarantine, the practice of isolation to prevent the spread of epidemic disease, derives from a Venetian dialect of the Italian ' quaranta giorni ' meaning ' forty days ', the period that ships were required to be isolated before passengers and crew could go ashore during the Black Death. References Jump up ^ Google nGrams Jump up ^ Oxford English Dictionary, 1st edition, s.v. Jump up ^ `` Sloane 's A000567 : Octagonal numbers ''. The On - Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016 - 05 - 31. Jump up ^ `` Sloane 's A002411 : Pentagonal pyramidal numbers ''. The On - Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016 - 05 - 31. Jump up ^ `` Sloane 's A005835 : Pseudoperfect ( or semiperfect ) numbers ''. The On - Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016 - 05 - 31. Jump up ^ `` Sloane 's A028442 : Numbers n such that Mertens ' function is zero ''. The On - Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016 - 05 - 31. Jump up ^ `` Sloane 's A005349 : Niven ( or Harshad ) numbers ''. The On - Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016 - 05 - 31. Jump up ^ `` Account Suspended ''. ngcic.org. ^ Jump up to : Michael David Coogan, A Brief Introduction to the Old Testament : The Hebrew Bible in Its Context, Oxford, 2008, p. 116 Jump up ^ https://www.jewishvirtuallibrary.org/jsource/judaica/ejud_0002_0007_0_06574.html Jump up ^ Qur'an 5 : 25 - 26 Jump up ^ Qur'an 7 : 142 Jump up ^ Dallal, Tamalyn ( 2007 ). 40 Days & 1001 Nights. Seattle : Melati Press. back cover. ISBN 978 - 0 - 9795155 - 0 - 7. Jump up ^ `` 40 Days & 1001 Nights - One Woman 's Dance Through Life in the Islamic World ''. Stanley Brandes, Forty : The Age and the Symbol. ( Knoxville, Univ of Tennessee Press, 1985 ) External links Wikisource has the text of the 1911 Encyclopædia Britannica article Forty. Media related to 40 ( number ) at Wikimedia Commons Integers 0s 0 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100s 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200s 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300s 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400s 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500s 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600s 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700s 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800s 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900s 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 Retrieved from `` https://en.wikipedia.org/w/index.php?title=40_(number)&oldid=834038177 '' Categories : Integers Hidden categories : All articles with unsourced statements Articles with unsourced statements from November 2012 Talk Contents About Wikipedia Аҧсшәа Avañe'ẽ Azərbaycanca تۆرکجه Bân - 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Question: what is the meaning of 40 years in the bible
Answer: a generation