80728692 has 48 divisors (see below), whose sum is σ = 212587200. Its totient is φ = 23618560.

The previous prime is 80728649. The next prime is 80728717. The reversal of 80728692 is 29682708.

It is a happy number.

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, 6717 + ... + 14372.

It is an arithmetic number, because the mean of its divisors is an integer number (4428900).

Almost surely, 2^80728692 is an apocalyptic number.

It is an amenable number.

80728692 is an abundant number, since it is smaller than the sum of its proper divisors (131858508).

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

80728692 is a wasteful number, since it uses less digits than its factorization.

80728692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21136 (or 21134 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 80728692 is about 8984.9146907469. The cubic root of 80728692 is about 432.1912519091.

The spelling of 80728692 in words is "eighty million, seven hundred twenty-eight thousand, six hundred ninety-two".