256329956 has 12 divisors (see below), whose sum is σ = 464045820. Its totient is φ = 123745440.

The previous prime is 256329943. The next prime is 256329967. The reversal of 256329956 is 659923652.

It is a happy number.

256329956 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 190881856 + 65448100 = 13816^2 + 8090^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 256329956.

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, 1104755 + ... + 1104986.

It is an arithmetic number, because the mean of its divisors is an integer number (38670485).

Almost surely, 2^256329956 is an apocalyptic number.

It is an amenable number.

256329956 is a deficient number, since it is larger than the sum of its proper divisors (207715864).

256329956 is a wasteful number, since it uses less digits than its factorization.

256329956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209774 (or 2209772 counting only the distinct ones).

The product of its digits is 874800, while the sum is 47.

The square root of 256329956 is about 16010.3078046613. The cubic root of 256329956 is about 635.2331018467.

The spelling of 256329956 in words is "two hundred fifty-six million, three hundred twenty-nine thousand, nine hundred fifty-six".