12403820728 has 16 divisors (see below), whose sum is σ = 25046176680. Its totient is φ = 5724840288.

The previous prime is 12403820701. The next prime is 12403820743. The reversal of 12403820728 is 82702830421.

It is a congruent number.

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, 59633650 + ... + 59633857.

Almost surely, 2^12403820728 is an apocalyptic number.

It is an amenable number.

12403820728 is an abundant number, since it is smaller than the sum of its proper divisors (12642355952).

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

12403820728 is a wasteful number, since it uses less digits than its factorization.

12403820728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119267526 (or 119267522 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The spelling of 12403820728 in words is "twelve billion, four hundred three million, eight hundred twenty thousand, seven hundred twenty-eight".