256057764 has 24 divisors (see below), whose sum is σ = 597898560. Its totient is φ = 85291104.

The previous prime is 256057721. The next prime is 256057843. The reversal of 256057764 is 467750652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11602 + ... + 25430.

It is an arithmetic number, because the mean of its divisors is an integer number (24912440).

Almost surely, 2^256057764 is an apocalyptic number.

It is an amenable number.

256057764 is an abundant number, since it is smaller than the sum of its proper divisors (341840796).

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

256057764 is a wasteful number, since it uses less digits than its factorization.

256057764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15379 (or 15377 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 256057764 is about 16001.8050231841. The cubic root of 256057764 is about 635.0081748178.

The spelling of 256057764 in words is "two hundred fifty-six million, fifty-seven thousand, seven hundred sixty-four".