256708 has 12 divisors (see below), whose sum is σ = 464940. Its totient is φ = 123872.

The previous prime is 256699. The next prime is 256721. The reversal of 256708 is 807652.

It can be written as a sum of positive squares in 2 ways, for example, as 213444 + 43264 = 462^2 + 208^2 .

It is a d-powerful number, because it can be written as 2¹⁷ + 5⁷ + 7³ + 6⁶ + 0 + 8³ .

It is an unprimeable number.

256708 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 991 + ... + 1222.

It is an arithmetic number, because the mean of its divisors is an integer number (38745).

2²⁵⁶⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

256708 is a deficient number, since it is larger than the sum of its proper divisors (208232).

256708 is a wasteful number, since it uses less digits than its factorization.

256708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246 (or 2244 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 256708 is about 506.6635964819. The cubic root of 256708 is about 63.5545236129.

The spelling of 256708 in words is "two hundred fifty-six thousand, seven hundred eight".