12788728 has 16 divisors (see below), whose sum is σ = 24020280. Its totient is φ = 6383328.

The previous prime is 12788719. The next prime is 12788801. The reversal of 12788728 is 82788721.

12788728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 5650 + ... + 7582.

Almost surely, 2^12788728 is an apocalyptic number.

It is an amenable number.

12788728 is a deficient number, since it is larger than the sum of its proper divisors (11231552).

12788728 is a wasteful number, since it uses less digits than its factorization.

12788728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766 (or 2762 counting only the distinct ones).

The product of its digits is 100352, while the sum is 43.

The square root of 12788728 is about 3576.1331071424. The cubic root of 12788728 is about 233.8527332077.

The spelling of 12788728 in words is "twelve million, seven hundred eighty-eight thousand, seven hundred twenty-eight".