80728700 has 36 divisors (see below), whose sum is σ = 188659800. Its totient is φ = 29807040.

The previous prime is 80728649. The next prime is 80728717. The reversal of 80728700 is 782708.

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 11 ways as a sum of consecutive naturals, for example, 29750 + ... + 32349.

It is an arithmetic number, because the mean of its divisors is an integer number (5240550).

Almost surely, 2^80728700 is an apocalyptic number.

It is an amenable number.

80728700 is an abundant number, since it is smaller than the sum of its proper divisors (107931100).

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

80728700 is a wasteful number, since it uses less digits than its factorization.

80728700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62126 (or 62119 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 80728700 is about 8984.9151359376. The cubic root of 80728700 is about 432.1912661854.

The spelling of 80728700 in words is "eighty million, seven hundred twenty-eight thousand, seven hundred".