256676 has 24 divisors (see below), whose sum is σ = 524160. Its totient is φ = 107712.

The previous prime is 256661. The next prime is 256687. The reversal of 256676 is 676652.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 4.

It is an unprimeable number.

256676 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 7 ways as a sum of consecutive naturals, for example, 2441 + ... + 2543.

It is an arithmetic number, because the mean of its divisors is an integer number (21840).

2²⁵⁶⁶⁷⁶ is an apocalyptic number.

It is an amenable number.

256676 is an abundant number, since it is smaller than the sum of its proper divisors (267484).

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

256676 is a wasteful number, since it uses less digits than its factorization.

256676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 201 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 256676 is about 506.6320163590. The cubic root of 256676 is about 63.5518827015.

It can be divided in two parts, 256 and 676, that multiplied together give a square (173056 = 416²).

The spelling of 256676 in words is "two hundred fifty-six thousand, six hundred seventy-six".