812879238 has 16 divisors (see below), whose sum is σ = 1626588720. Its totient is φ = 270821376.

The previous prime is 812879237. The next prime is 812879279. The reversal of 812879238 is 832978218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812879237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21483 + ... + 45686.

It is an arithmetic number, because the mean of its divisors is an integer number (101661795).

Almost surely, 2^812879238 is an apocalyptic number.

812879238 is an abundant number, since it is smaller than the sum of its proper divisors (813709482).

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

812879238 is a wasteful number, since it uses less digits than its factorization.

812879238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69191.

The product of its digits is 387072, while the sum is 48.

The square root of 812879238 is about 28511.0371259974. The cubic root of 812879238 is about 933.2729471419.

It can be divided in two parts, 81287 and 9238, that added together give a triangular number (90525 = T₄₂₅).

The spelling of 812879238 in words is "eight hundred twelve million, eight hundred seventy-nine thousand, two hundred thirty-eight".