256523256 has 96 divisors (see below), whose sum is σ = 797846400. Its totient is φ = 73638720.

The previous prime is 256523231. The next prime is 256523261. The reversal of 256523256 is 652325652.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 256523256.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6525 + ... + 23571.

It is an arithmetic number, because the mean of its divisors is an integer number (8310900).

Almost surely, 2^256523256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256523256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398923200).

256523256 is an abundant number, since it is smaller than the sum of its proper divisors (541323144).

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

256523256 is a wasteful number, since it uses less digits than its factorization.

256523256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17089 (or 17082 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 256523256 is about 16016.3434029119. The cubic root of 256523256 is about 635.3927394582.

The spelling of 256523256 in words is "two hundred fifty-six million, five hundred twenty-three thousand, two hundred fifty-six".