80819172 has 72 divisors (see below), whose sum is σ = 241550400. Its totient is φ = 22292928.

The previous prime is 80819161. The next prime is 80819227. The reversal of 80819172 is 27191808.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1779 + ... + 12837.

Almost surely, 2^80819172 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 80819172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120775200).

80819172 is an abundant number, since it is smaller than the sum of its proper divisors (160731228).

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

80819172 is a wasteful number, since it uses less digits than its factorization.

80819172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11105 (or 11100 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 80819172 is about 8989.9483869486. The cubic root of 80819172 is about 432.3526569940.

The spelling of 80819172 in words is "eighty million, eight hundred nineteen thousand, one hundred seventy-two".