40

40 (forty) is a positive integer following 39 and preceding 41. Its ordinal form is written "fortieth" or 40th.
== Properties ==
*40 is the 27th composite number.
*40 is an .
*40 is the only number whose letters are in alphabetical order.http://jeff560.tripod.com/words15.html
*40 is a number with four prime factors.https://www.calculator.net/factoring-calculator.html?cvar=40&x=44&y=26
== In googology ==
*In Greek-based number-naming systems, 40 is associated with the prefix "tetraconta-", and with the prefix "quadraginti-" in Latin systems.
*Nirvana Supermind coined zero-quaternol for this number, and is equal to Q<10,4> using quick array notation.Numbers from quick array notation - Integral View (retrieved 2021-06-20 13:42 UTC)
==Sources==
Category:Numbers
Category:Class 1
Category:Non-powers
Category:Numbers 0-99
Category:Numbers with 1 to 2 digits