80578920 has 64 divisors (see below), whose sum is σ = 249546240. Its totient is φ = 20793600.

The previous prime is 80578919. The next prime is 80578931. The reversal of 80578920 is 2987508.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7111 + ... + 14550.

It is an arithmetic number, because the mean of its divisors is an integer number (3899160).

Almost surely, 2^80578920 is an apocalyptic number.

It is an amenable number.

80578920 is an abundant number, since it is smaller than the sum of its proper divisors (168967320).

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

80578920 is a wasteful number, since it uses less digits than its factorization.

80578920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21706 (or 21702 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 80578920 is about 8976.5761847154. The cubic root of 80578920 is about 431.9238120100.

The spelling of 80578920 in words is "eighty million, five hundred seventy-eight thousand, nine hundred twenty".