813712172 has 48 divisors (see below), whose sum is σ = 1755297600. Its totient is φ = 321414912.

The previous prime is 813712139. The next prime is 813712181. The reversal of 813712172 is 271217318.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317954 + ... + 320502.

It is an arithmetic number, because the mean of its divisors is an integer number (36568700).

Almost surely, 2^813712172 is an apocalyptic number.

It is an amenable number.

813712172 is an abundant number, since it is smaller than the sum of its proper divisors (941585428).

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

813712172 is a wasteful number, since it uses less digits than its factorization.

813712172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450 (or 3448 counting only the distinct ones).

The product of its digits is 4704, while the sum is 32.

The square root of 813712172 is about 28525.6406063037. The cubic root of 813712172 is about 933.5916043186.

The spelling of 813712172 in words is "eight hundred thirteen million, seven hundred twelve thousand, one hundred seventy-two".