811836868 has 24 divisors (see below), whose sum is σ = 1437093504. Its totient is φ = 401263200.

The previous prime is 811836847. The next prime is 811836899. The reversal of 811836868 is 868638118.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139146 + ... + 144862.

It is an arithmetic number, because the mean of its divisors is an integer number (59878896).

Almost surely, 2^811836868 is an apocalyptic number.

It is an amenable number.

811836868 is a deficient number, since it is larger than the sum of its proper divisors (625256636).

811836868 is a wasteful number, since it uses less digits than its factorization.

811836868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6123 (or 6121 counting only the distinct ones).

The product of its digits is 442368, while the sum is 49.

The square root of 811836868 is about 28492.7511483184. The cubic root of 811836868 is about 932.8738588178.

The spelling of 811836868 in words is "eight hundred eleven million, eight hundred thirty-six thousand, eight hundred sixty-eight".