80815392 has 72 divisors (see below), whose sum is σ = 262656576. Its totient is φ = 23089536.

The previous prime is 80815391. The next prime is 80815403. The reversal of 80815392 is 29351808.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×80815392² = 13062255168227328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (80815391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18028 + ... + 22059.

It is an arithmetic number, because the mean of its divisors is an integer number (3648008).

Almost surely, 2^80815392 is an apocalyptic number.

It is an amenable number.

80815392 is an abundant number, since it is smaller than the sum of its proper divisors (181841184).

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

80815392 is a wasteful number, since it uses less digits than its factorization.

80815392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40110 (or 40099 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 80815392 is about 8989.7381496905. The cubic root of 80815392 is about 432.3459163553.

The spelling of 80815392 in words is "eighty million, eight hundred fifteen thousand, three hundred ninety-two".