256353264 has 30 divisors (see below), whose sum is σ = 717433496. Its totient is φ = 85451040.

The previous prime is 256353247. The next prime is 256353271. The reversal of 256353264 is 462353652.

256353264 is a `hidden beast` number, since 2 + 5 + 63 + 532 + 64 = 666.

256353264 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 889972 + ... + 890259.

Almost surely, 2^256353264 is an apocalyptic number.

256353264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256353264 is an abundant number, since it is smaller than the sum of its proper divisors (461080232).

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

256353264 is a wasteful number, since it uses less digits than its factorization.

256353264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780245 (or 1780236 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

The square root of 256353264 is about 16011.0356941704. The cubic root of 256353264 is about 635.2523551099.

The spelling of 256353264 in words is "two hundred fifty-six million, three hundred fifty-three thousand, two hundred sixty-four".