80439156 has 120 divisors (see below), whose sum is σ = 248814720. Its totient is φ = 22171968.

The previous prime is 80439131. The next prime is 80439173. The reversal of 80439156 is 65193408.

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

It is a self number, because there is not a number n which added to its sum of digits gives 80439156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 65161 + ... + 66383.

It is an arithmetic number, because the mean of its divisors is an integer number (2073456).

Almost surely, 2^80439156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80439156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124407360).

80439156 is an abundant number, since it is smaller than the sum of its proper divisors (168375564).

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

80439156 is a wasteful number, since it uses less digits than its factorization.

80439156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 80439156 is about 8968.7878779688. The cubic root of 80439156 is about 431.6739437826.

The spelling of 80439156 in words is "eighty million, four hundred thirty-nine thousand, one hundred fifty-six".