255858 has 8 divisors (see below), whose sum is σ = 511728. Its totient is φ = 85284.

The previous prime is 255851. The next prime is 255859. The reversal of 255858 is 858552.

It is a sphenic number, since it is the product of 3 distinct primes.

255858 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (255851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21316 + ... + 21327.

It is an arithmetic number, because the mean of its divisors is an integer number (63966).

2²⁵⁵⁸⁵⁸ is an apocalyptic number.

255858 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

255858 is a wasteful number, since it uses less digits than its factorization.

255858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42648.

The product of its digits is 16000, while the sum is 33.

The square root of 255858 is about 505.8240800911. The cubic root of 255858 is about 63.4842997537.

The spelling of 255858 in words is "two hundred fifty-five thousand, eight hundred fifty-eight".