816372680 has 16 divisors (see below), whose sum is σ = 1836838620. Its totient is φ = 326549056.

The previous prime is 816372671. The next prime is 816372701. The reversal of 816372680 is 86273618.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 802815556 + 13557124 = 28334^2 + 3682^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10204619 + ... + 10204698.

Almost surely, 2^816372680 is an apocalyptic number.

It is an amenable number.

816372680 is an abundant number, since it is smaller than the sum of its proper divisors (1020465940).

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

816372680 is a wasteful number, since it uses less digits than its factorization.

816372680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20409328 (or 20409324 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 816372680 is about 28572.2361743004. The cubic root of 816372680 is about 934.6079857403.

The spelling of 816372680 in words is "eight hundred sixteen million, three hundred seventy-two thousand, six hundred eighty".