80439990 has 32 divisors (see below), whose sum is σ = 193294080. Its totient is φ = 21424224.

The previous prime is 80439973. The next prime is 80440021. The reversal of 80439990 is 9993408.

It is a congruent number.

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, 41871 + ... + 43749.

It is an arithmetic number, because the mean of its divisors is an integer number (6040440).

Almost surely, 2^80439990 is an apocalyptic number.

80439990 is an abundant number, since it is smaller than the sum of its proper divisors (112854090).

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

80439990 is a wasteful number, since it uses less digits than its factorization.

80439990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3316.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 80439990 is about 8968.8343724254. The cubic root of 80439990 is about 431.6754356548.

The spelling of 80439990 in words is "eighty million, four hundred thirty-nine thousand, nine hundred ninety".