255855810 has 64 divisors (see below), whose sum is σ = 703137024. Its totient is φ = 58368000.

The previous prime is 255855793. The next prime is 255855829. The reversal of 255855810 is 18558552.

It is a super-2 number, since 2×255855810² = 130924391021512200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159010 + ... + 160610.

It is an arithmetic number, because the mean of its divisors is an integer number (10986516).

Almost surely, 2^255855810 is an apocalyptic number.

255855810 is an abundant number, since it is smaller than the sum of its proper divisors (447281214).

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

255855810 is a wasteful number, since it uses less digits than its factorization.

255855810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379.

The product of its (nonzero) digits is 80000, while the sum is 39.

The square root of 255855810 is about 15995.4934278377. The cubic root of 255855810 is about 634.8411862330.

The spelling of 255855810 in words is "two hundred fifty-five million, eight hundred fifty-five thousand, eight hundred ten".