2556904 has 16 divisors (see below), whose sum is σ = 5479200. Its totient is φ = 1095792.

The previous prime is 2556877. The next prime is 2556907. The reversal of 2556904 is 4096552.

It is not an unprimeable number, because it can be changed into a prime (2556907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22774 + ... + 22885.

It is an arithmetic number, because the mean of its divisors is an integer number (342450).

2^2556904 is an apocalyptic number.

It is an amenable number.

2556904 is an abundant number, since it is smaller than the sum of its proper divisors (2922296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2556904 is a wasteful number, since it uses less digits than its factorization.

2556904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45672 (or 45668 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2556904 is about 1599.0322073054. The cubic root of 2556904 is about 136.7429067639.

The spelling of 2556904 in words is "two million, five hundred fifty-six thousand, nine hundred four".