The urban region has 3,435,394 population . The density of  residents in Hanoi is 2,300/km 2  (5,900/sq mi) . The density of  residents in  the metro region of Hanoi is 662.1/km 2  (1,715/sq mi) . The metro region has 16,100,000 population . 14,708.8/km 2  (38,096/sq mi) is the density of inhabitents in  the urban region of Hanoi
There are 38096 inhabitents per sq mi in the urban region of Hanoi