811973860 has 12 divisors (see below), whose sum is σ = 1705145148. Its totient is φ = 324789536.

The previous prime is 811973849. The next prime is 811973863. The reversal of 811973860 is 68379118.

811973860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 207994084 + 603979776 = 14422^2 + 24576^2 .

It is not an unprimeable number, because it can be changed into a prime (811973863) 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, 20299327 + ... + 20299366.

It is an arithmetic number, because the mean of its divisors is an integer number (142095429).

Almost surely, 2^811973860 is an apocalyptic number.

It is an amenable number.

811973860 is an abundant number, since it is smaller than the sum of its proper divisors (893171288).

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

811973860 is a wasteful number, since it uses less digits than its factorization.

811973860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40598702 (or 40598700 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 811973860 is about 28495.1550267760. The cubic root of 811973860 is about 932.9263279255.

The spelling of 811973860 in words is "eight hundred eleven million, nine hundred seventy-three thousand, eight hundred sixty".