855808 has 18 divisors (see below), whose sum is σ = 1708784. Its totient is φ = 427776.

The previous prime is 855787. The next prime is 855821. The reversal of 855808 is 808558.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1416 + ... + 1927.

2⁸⁵⁵⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

855808 is a deficient number, since it is larger than the sum of its proper divisors (852976).

855808 is an equidigital number, since it uses as much as digits as its factorization.

855808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359 (or 3345 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 855808 is about 925.0989136303. The cubic root of 855808 is about 94.9420884349.

The spelling of 855808 in words is "eight hundred fifty-five thousand, eight hundred eight".