816869580 has 24 divisors (see below), whose sum is σ = 2287234992. Its totient is φ = 217831872.

The previous prime is 816869579. The next prime is 816869597. The reversal of 816869580 is 85968618.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6807187 + ... + 6807306.

It is an arithmetic number, because the mean of its divisors is an integer number (95301458).

Almost surely, 2^816869580 is an apocalyptic number.

It is an amenable number.

816869580 is an abundant number, since it is smaller than the sum of its proper divisors (1470365412).

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

816869580 is a wasteful number, since it uses less digits than its factorization.

816869580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13614505 (or 13614503 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 51.

The square root of 816869580 is about 28580.9303557459. The cubic root of 816869580 is about 934.7975693002.

The spelling of 816869580 in words is "eight hundred sixteen million, eight hundred sixty-nine thousand, five hundred eighty".