256320968 has 16 divisors (see below), whose sum is σ = 508872780. Its totient is φ = 120621568.

The previous prime is 256320929. The next prime is 256320973. The reversal of 256320968 is 869023652.

256320968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 219573124 + 36747844 = 14818^2 + 6062^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942221 + ... + 942492.

Almost surely, 2^256320968 is an apocalyptic number.

It is an amenable number.

256320968 is a deficient number, since it is larger than the sum of its proper divisors (252551812).

256320968 is a wasteful number, since it uses less digits than its factorization.

256320968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884736 (or 1884732 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 256320968 is about 16010.0271080345. The cubic root of 256320968 is about 635.2256771170.

The spelling of 256320968 in words is "two hundred fifty-six million, three hundred twenty thousand, nine hundred sixty-eight".