811712920 has 32 divisors (see below), whose sum is σ = 1827165600. Its totient is φ = 324540928.

The previous prime is 811712917. The next prime is 811712953. The reversal of 811712920 is 29217118.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171141 + ... + 175819.

It is an arithmetic number, because the mean of its divisors is an integer number (57098925).

Almost surely, 2^811712920 is an apocalyptic number.

It is an amenable number.

811712920 is an abundant number, since it is smaller than the sum of its proper divisors (1015452680).

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

811712920 is a wasteful number, since it uses less digits than its factorization.

811712920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9027 (or 9023 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 811712920 is about 28490.5759857536. The cubic root of 811712920 is about 932.8263805872.

The spelling of 811712920 in words is "eight hundred eleven million, seven hundred twelve thousand, nine hundred twenty".