256537260 has 96 divisors (see below), whose sum is σ = 912145920. Its totient is φ = 58636224.

The previous prime is 256537223. The next prime is 256537261. The reversal of 256537260 is 62735652.

It is a happy number.

256537260 is a `hidden beast` number, since 2 + 565 + 37 + 2 + 60 = 666.

It is a super-2 number, since 2×256537260² = 131622731536615200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (256537261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30154 + ... + 37713.

It is an arithmetic number, because the mean of its divisors is an integer number (9501520).

Almost surely, 2^256537260 is an apocalyptic number.

256537260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256537260 is an abundant number, since it is smaller than the sum of its proper divisors (655608660).

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

256537260 is a wasteful number, since it uses less digits than its factorization.

256537260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67892 (or 67884 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 256537260 is about 16016.7805753841. The cubic root of 256537260 is about 635.4043016042.

The spelling of 256537260 in words is "two hundred fifty-six million, five hundred thirty-seven thousand, two hundred sixty".