80817992 has 32 divisors (see below), whose sum is σ = 157048320. Its totient is φ = 38949120.

The previous prime is 80817959. The next prime is 80818009. The reversal of 80817992 is 29971808.

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, 83093 + ... + 84059.

It is an arithmetic number, because the mean of its divisors is an integer number (4907760).

Almost surely, 2^80817992 is an apocalyptic number.

It is an amenable number.

80817992 is a deficient number, since it is larger than the sum of its proper divisors (76230328).

80817992 is a wasteful number, since it uses less digits than its factorization.

80817992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 80817992 is about 8989.8827578562. The cubic root of 80817992 is about 432.3505527960.

The spelling of 80817992 in words is "eighty million, eight hundred seventeen thousand, nine hundred ninety-two".