12864728 has 32 divisors (see below), whose sum is σ = 25401600. Its totient is φ = 6096288.

The previous prime is 12864707. The next prime is 12864739. The reversal of 12864728 is 82746821.

It is a junction number, because it is equal to n+sod(n) for n = 12864691 and 12864700.

It is a congruent number.

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, 25325 + ... + 25827.

It is an arithmetic number, because the mean of its divisors is an integer number (793800).

Almost surely, 2^12864728 is an apocalyptic number.

It is an amenable number.

12864728 is a deficient number, since it is larger than the sum of its proper divisors (12536872).

12864728 is a wasteful number, since it uses less digits than its factorization.

12864728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 667 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 12864728 is about 3586.7433696879. The cubic root of 12864728 is about 234.3150600617.

The spelling of 12864728 in words is "twelve million, eight hundred sixty-four thousand, seven hundred twenty-eight".