256165460 has 48 divisors (see below), whose sum is σ = 545244672. Its totient is φ = 101088000.

The previous prime is 256165451. The next prime is 256165487. The reversal of 256165460 is 64561652.

It is a self number, because there is not a number n which added to its sum of digits gives 256165460.

It is a congruent number.

It is an unprimeable number.

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, 818264 + ... + 818576.

It is an arithmetic number, because the mean of its divisors is an integer number (11359264).

Almost surely, 2^256165460 is an apocalyptic number.

256165460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256165460 is an abundant number, since it is smaller than the sum of its proper divisors (289079212).

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

256165460 is a wasteful number, since it uses less digits than its factorization.

256165460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 256165460 is about 16005.1697897898. The cubic root of 256165460 is about 635.0971889186.

The spelling of 256165460 in words is "two hundred fifty-six million, one hundred sixty-five thousand, four hundred sixty".