256648974 has 16 divisors (see below), whose sum is σ = 514622160. Its totient is φ = 85328960.

The previous prime is 256648967. The next prime is 256648981. The reversal of 256648974 is 479846652.

256648974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256648967) and next prime (256648981).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 52647 + ... + 57314.

It is an arithmetic number, because the mean of its divisors is an integer number (32163885).

Almost surely, 2^256648974 is an apocalyptic number.

256648974 is an abundant number, since it is smaller than the sum of its proper divisors (257973186).

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

256648974 is a wasteful number, since it uses less digits than its factorization.

256648974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110355.

The product of its digits is 2903040, while the sum is 51.

The square root of 256648974 is about 16020.2676007612. The cubic root of 256648974 is about 635.4965211579.

It can be divided in two parts, 256 and 648974, that added together give a triangular number (649230 = T₁₁₃₉).

The spelling of 256648974 in words is "two hundred fifty-six million, six hundred forty-eight thousand, nine hundred seventy-four".