256886874 has 12 divisors (see below), whose sum is σ = 556588266. Its totient is φ = 85628952.

The previous prime is 256886869. The next prime is 256886879. The reversal of 256886874 is 478688652.

256886874 is a `hidden beast` number, since 2 + 568 + 8 + 6 + 8 + 74 = 666.

It is an interprime number because it is at equal distance from previous prime (256886869) and next prime (256886879).

It can be written as a sum of positive squares in only one way, i.e., 199233225 + 57653649 = 14115^2 + 7593^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 256886874.

It is not an unprimeable number, because it can be changed into a prime (256886879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7135729 + ... + 7135764.

Almost surely, 2^256886874 is an apocalyptic number.

256886874 is an abundant number, since it is smaller than the sum of its proper divisors (299701392).

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

256886874 is a wasteful number, since it uses less digits than its factorization.

256886874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14271501 (or 14271498 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The square root of 256886874 is about 16027.6908505249. The cubic root of 256886874 is about 635.6928177191.

The spelling of 256886874 in words is "two hundred fifty-six million, eight hundred eighty-six thousand, eight hundred seventy-four".