256712856 has 32 divisors (see below), whose sum is σ = 642297600. Its totient is φ = 85502240.

The previous prime is 256712839. The next prime is 256712861. The reversal of 256712856 is 658217652.

256712856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 32725 + ... + 39803.

It is an arithmetic number, because the mean of its divisors is an integer number (20071800).

Almost surely, 2^256712856 is an apocalyptic number.

It is an amenable number.

256712856 is an abundant number, since it is smaller than the sum of its proper divisors (385584744).

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

256712856 is a wasteful number, since it uses less digits than its factorization.

256712856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8599 (or 8595 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 256712856 is about 16022.2612636294. The cubic root of 256712856 is about 635.5492435207.

The spelling of 256712856 in words is "two hundred fifty-six million, seven hundred twelve thousand, eight hundred fifty-six".