256856306 has 32 divisors (see below), whose sum is σ = 457712640. Its totient is φ = 105771456.

The previous prime is 256856263. The next prime is 256856321. The reversal of 256856306 is 603658652.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89120 + ... + 91956.

It is an arithmetic number, because the mean of its divisors is an integer number (14303520).

Almost surely, 2^256856306 is an apocalyptic number.

256856306 is a deficient number, since it is larger than the sum of its proper divisors (200856334).

256856306 is a wasteful number, since it uses less digits than its factorization.

256856306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3098.

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 256856306 is about 16026.7372225291. The cubic root of 256856306 is about 635.6676021724.

The spelling of 256856306 in words is "two hundred fifty-six million, eight hundred fifty-six thousand, three hundred six".