256588308228 has 96 divisors (see below), whose sum is σ = 689946342400. Its totient is φ = 72700281216.

The previous prime is 256588308173. The next prime is 256588308233. The reversal of 256588308228 is 822803885652.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10578018 + ... + 10602246.

Almost surely, 2^256588308228 is an apocalyptic number.

256588308228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256588308228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344973171200).

256588308228 is an abundant number, since it is smaller than the sum of its proper divisors (433358034172).

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

256588308228 is a wasteful number, since it uses less digits than its factorization.

256588308228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25289 (or 25287 counting only the distinct ones).

The product of its (nonzero) digits is 14745600, while the sum is 57.

The spelling of 256588308228 in words is "two hundred fifty-six billion, five hundred eighty-eight million, three hundred eight thousand, two hundred twenty-eight".