80909992 has 16 divisors (see below), whose sum is σ = 151830900. Its totient is φ = 40421760.

The previous prime is 80909981. The next prime is 80910007. The reversal of 80909992 is 29990908.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 80892036 + 17956 = 8994^2 + 134^2 .

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, 8434 + ... + 15262.

Almost surely, 2^80909992 is an apocalyptic number.

It is an amenable number.

80909992 is a deficient number, since it is larger than the sum of its proper divisors (70920908).

80909992 is a wasteful number, since it uses less digits than its factorization.

80909992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8316 (or 8312 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 80909992 is about 8994.9981656474. The cubic root of 80909992 is about 432.5145474965.

The spelling of 80909992 in words is "eighty million, nine hundred nine thousand, nine hundred ninety-two".