80404400728 has 16 divisors (see below), whose sum is σ = 150913526760. Its totient is φ = 40160793600.

The previous prime is 80404400719. The next prime is 80404400729. The reversal of 80404400728 is 82700440408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80404400729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5167593 + ... + 5183128.

Almost surely, 2^80404400728 is an apocalyptic number.

It is an amenable number.

80404400728 is a deficient number, since it is larger than the sum of its proper divisors (70509126032).

80404400728 is a wasteful number, since it uses less digits than its factorization.

80404400728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10351698 (or 10351694 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The spelling of 80404400728 in words is "eighty billion, four hundred four million, four hundred thousand, seven hundred twenty-eight".