256939368 has 32 divisors (see below), whose sum is σ = 734112960. Its totient is φ = 73411200.

The previous prime is 256939349. The next prime is 256939369. The reversal of 256939368 is 863939652.

It is a self number, because there is not a number n which added to its sum of digits gives 256939368.

It is not an unprimeable number, because it can be changed into a prime (256939369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764533 + ... + 764868.

It is an arithmetic number, because the mean of its divisors is an integer number (22941030).

Almost surely, 2^256939368 is an apocalyptic number.

256939368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

256939368 is an abundant number, since it is smaller than the sum of its proper divisors (477173592).

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

256939368 is a wasteful number, since it uses less digits than its factorization.

256939368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529417 (or 1529413 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 51.

The square root of 256939368 is about 16029.3283702094. The cubic root of 256939368 is about 635.7361153589.

The spelling of 256939368 in words is "two hundred fifty-six million, nine hundred thirty-nine thousand, three hundred sixty-eight".