80728044 has 12 divisors (see below), whose sum is σ = 188365464. Its totient is φ = 26909344.

The previous prime is 80728031. The next prime is 80728079. The reversal of 80728044 is 44082708.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 80727996 and 80728014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3363657 + ... + 3363680.

It is an arithmetic number, because the mean of its divisors is an integer number (15697122).

Almost surely, 2^80728044 is an apocalyptic number.

It is an amenable number.

80728044 is an abundant number, since it is smaller than the sum of its proper divisors (107637420).

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

80728044 is a wasteful number, since it uses less digits than its factorization.

80728044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6727344 (or 6727342 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 80728044 is about 8984.8786302320. The cubic root of 80728044 is about 432.1900955227.

The spelling of 80728044 in words is "eighty million, seven hundred twenty-eight thousand, forty-four".