256012560 has 60 divisors (see below), whose sum is σ = 859777932. Its totient is φ = 68269824.

The previous prime is 256012531. The next prime is 256012573. The reversal of 256012560 is 65210652.

256012560 is a `hidden beast` number, since 2 + 5 + 601 + 2 + 56 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 43086096 + 212926464 = 6564^2 + 14592^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

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, 177067 + ... + 178506.

Almost surely, 2^256012560 is an apocalyptic number.

256012560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256012560 is an abundant number, since it is smaller than the sum of its proper divisors (603765372).

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

256012560 is a wasteful number, since it uses less digits than its factorization.

256012560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355592 (or 355583 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 256012560 is about 16000.3924951859. The cubic root of 256012560 is about 634.9708048660.

The spelling of 256012560 in words is "two hundred fifty-six million, twelve thousand, five hundred sixty".