80731992 has 32 divisors (see below), whose sum is σ = 220178880. Its totient is φ = 24464160.

The previous prime is 80731991. The next prime is 80732023. The reversal of 80731992 is 29913708.

It is a self number, because there is not a number n which added to its sum of digits gives 80731992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80731991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152638 + ... + 153165.

It is an arithmetic number, because the mean of its divisors is an integer number (6880590).

Almost surely, 2^80731992 is an apocalyptic number.

It is an amenable number.

80731992 is an abundant number, since it is smaller than the sum of its proper divisors (139446888).

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

80731992 is a wasteful number, since it uses less digits than its factorization.

80731992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305823 (or 305819 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 80731992 is about 8985.0983300129. The cubic root of 80731992 is about 432.1971408178.

The spelling of 80731992 in words is "eighty million, seven hundred thirty-one thousand, nine hundred ninety-two".