256623968 has 24 divisors (see below), whose sum is σ = 505985760. Its totient is φ = 128119680.

The previous prime is 256623953. The next prime is 256623979. The reversal of 256623968 is 869326652.

256623968 is digitally balanced in base 2, 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 3 ways as a sum of consecutive naturals, for example, 17033 + ... + 28343.

It is an arithmetic number, because the mean of its divisors is an integer number (21082740).

Almost surely, 2^256623968 is an apocalyptic number.

It is an amenable number.

256623968 is a deficient number, since it is larger than the sum of its proper divisors (249361792).

256623968 is a wasteful number, since it uses less digits than its factorization.

256623968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12030 (or 12022 counting only the distinct ones).

The product of its digits is 933120, while the sum is 47.

The square root of 256623968 is about 16019.4871328641. The cubic root of 256623968 is about 635.4758811090.

The spelling of 256623968 in words is "two hundred fifty-six million, six hundred twenty-three thousand, nine hundred sixty-eight".