80831920 has 40 divisors (see below), whose sum is σ = 202393296. Its totient is φ = 29845248.

The previous prime is 80831917. The next prime is 80831953. The reversal of 80831920 is 2913808.

It is a tau number, because it is divible by the number of its divisors (40).

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, 37822 + ... + 39901.

Almost surely, 2^80831920 is an apocalyptic number.

80831920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80831920 is an abundant number, since it is smaller than the sum of its proper divisors (121561376).

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

80831920 is a wasteful number, since it uses less digits than its factorization.

80831920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77749 (or 77743 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 80831920 is about 8990.6573730735. The cubic root of 80831920 is about 432.3753881595.

The spelling of 80831920 in words is "eighty million, eight hundred thirty-one thousand, nine hundred twenty".