Four thousand
4000 is an even number.
4000 is a Harshad number, which means it is divisible by the sum of its digits (4 + 0 + 0 + 0 = 4, and 4000 is divisible by 4).
In binary, 4000 is represented as 111110100000.
In hex, 4000 is represented as fa0.
Prime factorization of 4000: 25 * 53.
Factors of 4000 are: 1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000.