1,275/km 2  (3,300/sq mi) is the density of residents in  the metro region of Hanoi . The population of Hanoi is 595,061 . The land area of the city is 16.0 sq mi (41.4 sq km) . The area of the urban region is 1,770 sq mi (4,600 km 2 ) . Hanoi is named for Henry E. Huntington . +226 is the area code of Hanoi . The density of  people in Hanoi is 3,200/km 2  (8,200/sq mi) . The postal code of the city is 3000 00 -  3019 00 . The Hanoi city highest elevation is 5,364 m (17,598 ft) . The province of the city Hanoi is East Java . Hanoi is at an elevation of 13 ft . Area: 2,493.86 km2 (962.88 sq mi) is the area of the metro region of Hanoi . 3,423/km 2  (8,870/sq mi) is the density of residents in  the urban region of Hanoi . The Hanoi citys' lowest elevation is 1 m  . Hanoi is the government of Municipality of Quito . Hanoi is located in Zambia . The city Hanoi demonym is Istanbulite 
Hanoi is 57 metresabove sea level