624256 has 16 divisors (see below), whose sum is σ = 1243890. Its totient is φ = 312064.

The previous prime is 624251. The next prime is 624259. The reversal of 624256 is 652426.

It can be written as a sum of positive squares in only one way, i.e., 577600 + 46656 = 760^2 + 216^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 624256.

It is not an unprimeable number, because it can be changed into a prime (624251) by changing a digit.

624256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2311 + ... + 2566.

2⁶²⁴²⁵⁶ is an apocalyptic number.

It is an amenable number.

624256 is a deficient number, since it is larger than the sum of its proper divisors (619634).

624256 is an equidigital number, since it uses as much as digits as its factorization.

624256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4891 (or 4879 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 624256 is about 790.0987280081. The cubic root of 624256 is about 85.4648579403.

The spelling of 624256 in words is "six hundred twenty-four thousand, two hundred fifty-six".