256022538 has 24 divisors (see below), whose sum is σ = 517013952. Its totient is φ = 84520584.

The previous prime is 256022531. The next prime is 256022539. The reversal of 256022538 is 835220652.

It is a super-2 number, since 2×256022538² = 131095079927922888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256022499 and 256022508.

It is not an unprimeable number, because it can be changed into a prime (256022531) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 66831 + ... + 70557.

It is an arithmetic number, because the mean of its divisors is an integer number (21542248).

Almost surely, 2^256022538 is an apocalyptic number.

256022538 is an abundant number, since it is smaller than the sum of its proper divisors (260991414).

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

256022538 is a wasteful number, since it uses less digits than its factorization.

256022538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3946 (or 3839 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 256022538 is about 16000.7042969989. The cubic root of 256022538 is about 634.9790540139.

The spelling of 256022538 in words is "two hundred fifty-six million, twenty-two thousand, five hundred thirty-eight".