256297286 has 24 divisors (see below), whose sum is σ = 449867664. Its totient is φ = 107276400.

The previous prime is 256297247. The next prime is 256297309. The reversal of 256297286 is 682792652.

256297286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 256297286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20936 + ... + 30836.

It is an arithmetic number, because the mean of its divisors is an integer number (18744486).

Almost surely, 2^256297286 is an apocalyptic number.

256297286 is a deficient number, since it is larger than the sum of its proper divisors (193570378).

256297286 is an equidigital number, since it uses as much as digits as its factorization.

256297286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9996 (or 9953 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The square root of 256297286 is about 16009.2874919529. The cubic root of 256297286 is about 635.2061132633.

The spelling of 256297286 in words is "two hundred fifty-six million, two hundred ninety-seven thousand, two hundred eighty-six".