80615872 has 56 divisors (see below), whose sum is σ = 166786560. Its totient is φ = 38618880.

The previous prime is 80615867. The next prime is 80615891. The reversal of 80615872 is 27851608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355023 + ... + 355249.

Almost surely, 2^80615872 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 80615872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83393280).

80615872 is an abundant number, since it is smaller than the sum of its proper divisors (86170688).

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

80615872 is a wasteful number, since it uses less digits than its factorization.

80615872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 80615872 is about 8978.6341945755. The cubic root of 80615872 is about 431.9898260064.

The spelling of 80615872 in words is "eighty million, six hundred fifteen thousand, eight hundred seventy-two".