256308479 has 16 divisors (see below), whose sum is σ = 296755200. Its totient is φ = 216838944.

The previous prime is 256308419. The next prime is 256308497. The reversal of 256308479 is 974803652.

It is a de Polignac number, because none of the positive numbers 2^k-256308479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256308419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202952 + ... + 204210.

It is an arithmetic number, because the mean of its divisors is an integer number (18547200).

Almost surely, 2^256308479 is an apocalyptic number.

256308479 is a deficient number, since it is larger than the sum of its proper divisors (40446721).

256308479 is a wasteful number, since it uses less digits than its factorization.

256308479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 256308479 is about 16009.6370664672. The cubic root of 256308479 is about 635.2153600233.

The spelling of 256308479 in words is "two hundred fifty-six million, three hundred eight thousand, four hundred seventy-nine".