80439820 has 24 divisors (see below), whose sum is σ = 170478000. Its totient is φ = 31879872.

The previous prime is 80439817. The next prime is 80439829. The reversal of 80439820 is 2893408.

It is not an unprimeable number, because it can be changed into a prime (80439829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16270 + ... + 20629.

It is an arithmetic number, because the mean of its divisors is an integer number (7103250).

Almost surely, 2^80439820 is an apocalyptic number.

It is an amenable number.

80439820 is an abundant number, since it is smaller than the sum of its proper divisors (90038180).

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

80439820 is a wasteful number, since it uses less digits than its factorization.

80439820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37017 (or 37015 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 80439820 is about 8968.8248951577. The cubic root of 80439820 is about 431.6751315570.

The spelling of 80439820 in words is "eighty million, four hundred thirty-nine thousand, eight hundred twenty".