256764968 has 32 divisors (see below), whose sum is σ = 490432320. Its totient is φ = 126000000.

The previous prime is 256764967. The next prime is 256765007. The reversal of 256764968 is 869467652.

It is not an unprimeable number, because it can be changed into a prime (256764961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141668 + ... + 143468.

It is an arithmetic number, because the mean of its divisors is an integer number (15326010).

Almost surely, 2^256764968 is an apocalyptic number.

It is an amenable number.

256764968 is a deficient number, since it is larger than the sum of its proper divisors (233667352).

256764968 is a wasteful number, since it uses less digits than its factorization.

256764968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129 (or 2125 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 53.

The square root of 256764968 is about 16023.8874184762. The cubic root of 256764968 is about 635.5922455242.

The spelling of 256764968 in words is "two hundred fifty-six million, seven hundred sixty-four thousand, nine hundred sixty-eight".