256117924 has 12 divisors (see below), whose sum is σ = 449500464. Its totient is φ = 127689224.

The previous prime is 256117907. The next prime is 256117943. The reversal of 256117924 is 429711652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90874 + ... + 93649.

It is an arithmetic number, because the mean of its divisors is an integer number (37458372).

Almost surely, 2^256117924 is an apocalyptic number.

It is an amenable number.

256117924 is a deficient number, since it is larger than the sum of its proper divisors (193382540).

256117924 is a wasteful number, since it uses less digits than its factorization.

256117924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184874 (or 184872 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 256117924 is about 16003.6847007181. The cubic root of 256117924 is about 635.0579020092.

The spelling of 256117924 in words is "two hundred fifty-six million, one hundred seventeen thousand, nine hundred twenty-four".