256982774 has 16 divisors (see below), whose sum is σ = 390746160. Its totient is φ = 126739200.

The previous prime is 256982731. The next prime is 256982801. The reversal of 256982774 is 477289652.

It is a super-2 number, since 2×256982774² = 132080292265470152, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198722 + ... + 200010.

It is an arithmetic number, because the mean of its divisors is an integer number (24421635).

Almost surely, 2^256982774 is an apocalyptic number.

256982774 is a deficient number, since it is larger than the sum of its proper divisors (133763386).

256982774 is a wasteful number, since it uses less digits than its factorization.

256982774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575.

The product of its digits is 1693440, while the sum is 50.

The square root of 256982774 is about 16030.6822686996. The cubic root of 256982774 is about 635.7719126604.

The spelling of 256982774 in words is "two hundred fifty-six million, nine hundred eighty-two thousand, seven hundred seventy-four".