256120260 has 96 divisors (see below), whose sum is σ = 785683584. Its totient is φ = 61824000.

The previous prime is 256120259. The next prime is 256120261. The reversal of 256120260 is 62021652.

It is an interprime number because it is at equal distance from previous prime (256120259) and next prime (256120261).

It is a self number, because there is not a number n which added to its sum of digits gives 256120260.

It is not an unprimeable number, because it can be changed into a prime (256120261) 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, 184770 + ... + 186150.

It is an arithmetic number, because the mean of its divisors is an integer number (8184204).

Almost surely, 2^256120260 is an apocalyptic number.

256120260 is a gapful number since it is divisible by the number (20) 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 256120260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392841792).

256120260 is an abundant number, since it is smaller than the sum of its proper divisors (529563324).

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

256120260 is a wasteful number, since it uses less digits than its factorization.

256120260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685 (or 1683 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 256120260 is about 16003.7576837442. The cubic root of 256120260 is about 635.0598327484.

The spelling of 256120260 in words is "two hundred fifty-six million, one hundred twenty thousand, two hundred sixty".