812715288 has 64 divisors (see below), whose sum is σ = 2533144320. Its totient is φ = 211094400.

The previous prime is 812715283. The next prime is 812715307. The reversal of 812715288 is 882517218.

It is a super-2 number, since 2×812715288² = 1321012278697845888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812715283) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 218043 + ... + 221738.

It is an arithmetic number, because the mean of its divisors is an integer number (39580380).

Almost surely, 2^812715288 is an apocalyptic number.

812715288 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

812715288 is an abundant number, since it is smaller than the sum of its proper divisors (1720429032).

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

812715288 is a wasteful number, since it uses less digits than its factorization.

812715288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439808 (or 439804 counting only the distinct ones).

The product of its digits is 71680, while the sum is 42.

The square root of 812715288 is about 28508.1617786907. The cubic root of 812715288 is about 933.2101988350.

The spelling of 812715288 in words is "eight hundred twelve million, seven hundred fifteen thousand, two hundred eighty-eight".