256604772 has 24 divisors (see below), whose sum is σ = 611485056. Its totient is φ = 83714848.

The previous prime is 256604759. The next prime is 256604791. The reversal of 256604772 is 277406652.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 256604772.

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, 226923 + ... + 228050.

It is an arithmetic number, because the mean of its divisors is an integer number (25478544).

Almost surely, 2^256604772 is an apocalyptic number.

It is an amenable number.

256604772 is an abundant number, since it is smaller than the sum of its proper divisors (354880284).

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

256604772 is a wasteful number, since it uses less digits than its factorization.

256604772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455027 (or 455025 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 39.

The square root of 256604772 is about 16018.8879763859. The cubic root of 256604772 is about 635.4600357468.

The spelling of 256604772 in words is "two hundred fifty-six million, six hundred four thousand, seven hundred seventy-two".