256286788 has 12 divisors (see below), whose sum is σ = 448682220. Its totient is φ = 128091872.

The previous prime is 256286759. The next prime is 256286809. The reversal of 256286788 is 887682652.

It can be written as a sum of positive squares in 2 ways, for example, as 153710404 + 102576384 = 12398^2 + 10128^2 .

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, 331 + ... + 22642.

It is an arithmetic number, because the mean of its divisors is an integer number (37390185).

Almost surely, 2^256286788 is an apocalyptic number.

It is an amenable number.

256286788 is a deficient number, since it is larger than the sum of its proper divisors (192395432).

256286788 is a wasteful number, since it uses less digits than its factorization.

256286788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25766 (or 25764 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 52.

The square root of 256286788 is about 16008.9596164148. The cubic root of 256286788 is about 635.1974404119.

The spelling of 256286788 in words is "two hundred fifty-six million, two hundred eighty-six thousand, seven hundred eighty-eight".