256840608 has 24 divisors (see below), whose sum is σ = 674206848. Its totient is φ = 85613504.

The previous prime is 256840603. The next prime is 256840631. The reversal of 256840608 is 806048652.

256840608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (256840603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1337616 + ... + 1337807.

It is an arithmetic number, because the mean of its divisors is an integer number (28091952).

Almost surely, 2^256840608 is an apocalyptic number.

It is an amenable number.

256840608 is an abundant number, since it is smaller than the sum of its proper divisors (417366240).

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

256840608 is a wasteful number, since it uses less digits than its factorization.

256840608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675436 (or 2675428 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 256840608 is about 16026.2474709459. The cubic root of 256840608 is about 635.6546521130.

The spelling of 256840608 in words is "two hundred fifty-six million, eight hundred forty thousand, six hundred eight".