Six thousand four hundred forty
6440 is an even number.
6440 is a Harshad number, which means it is divisible by the sum of its digits (6 + 4 + 4 + 0 = 14, and 6440 is divisible by 14).
In binary, 6440 is represented as 1100100101000.
In hex, 6440 is represented as 1928.
Prime factorization of 6440: 23 * 5 * 7 * 23.
Factors of 6440 are: 1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3220, 6440.