256185960 has 64 divisors (see below), whose sum is σ = 801982080. Its totient is φ = 65345280.

The previous prime is 256185901. The next prime is 256185961. The reversal of 256185960 is 69581652.

It is a super-2 number, since 2×256185960² = 131262492202243200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256185961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43651 + ... + 49170.

It is an arithmetic number, because the mean of its divisors is an integer number (12530970).

Almost surely, 2^256185960 is an apocalyptic number.

256185960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256185960 is an abundant number, since it is smaller than the sum of its proper divisors (545796120).

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

256185960 is a wasteful number, since it uses less digits than its factorization.

256185960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92858 (or 92854 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 256185960 is about 16005.8101950510. The cubic root of 256185960 is about 635.1141299809.

The spelling of 256185960 in words is "two hundred fifty-six million, one hundred eighty-five thousand, nine hundred sixty".