12307728 has 40 divisors (see below), whose sum is σ = 33667488. Its totient is φ = 3860992.

The previous prime is 12307703. The next prime is 12307741. The reversal of 12307728 is 82770321.

12307728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12307695 and 12307704.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6726 + ... + 8357.

Almost surely, 2^12307728 is an apocalyptic number.

It is an amenable number.

12307728 is an abundant number, since it is smaller than the sum of its proper divisors (21359760).

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

12307728 is a wasteful number, since it uses less digits than its factorization.

12307728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15111 (or 15105 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 12307728 is about 3508.2371641609. The cubic root of 12307728 is about 230.8833578397.

The spelling of 12307728 in words is "twelve million, three hundred seven thousand, seven hundred twenty-eight".