255688 has 16 divisors (see below), whose sum is σ = 495360. Its totient is φ = 123600.

The previous prime is 255679. The next prime is 255709. The reversal of 255688 is 886552.

It is a plaindrome in base 10.

It is a nialpdrome in base 8.

It is an unprimeable number.

255688 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, 268 + ... + 763.

It is an arithmetic number, because the mean of its divisors is an integer number (30960).

2²⁵⁵⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

255688 is a deficient number, since it is larger than the sum of its proper divisors (239672).

255688 is a wasteful number, since it uses less digits than its factorization.

255688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1064 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 255688 is about 505.6560095559. The cubic root of 255688 is about 63.4702363252.

The spelling of 255688 in words is "two hundred fifty-five thousand, six hundred eighty-eight".