256974936 has 32 divisors (see below), whose sum is σ = 646758000. Its totient is φ = 85082240.

The previous prime is 256974919. The next prime is 256974959. The reversal of 256974936 is 639479652.

It is a super-2 number, since 2×256974936² = 132072235464408192, which contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 32355 + ... + 39506.

Almost surely, 2^256974936 is an apocalyptic number.

It is an amenable number.

256974936 is an abundant number, since it is smaller than the sum of its proper divisors (389783064).

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

256974936 is a wasteful number, since it uses less digits than its factorization.

256974936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72019 (or 72015 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 51.

The square root of 256974936 is about 16030.4377981389. The cubic root of 256974936 is about 635.7654488926.

The spelling of 256974936 in words is "two hundred fifty-six million, nine hundred seventy-four thousand, nine hundred thirty-six".