12928784 has 20 divisors (see below), whose sum is σ = 27327120. Its totient is φ = 5876640.

The previous prime is 12928757. The next prime is 12928813. The reversal of 12928784 is 48782921.

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, 36554 + ... + 36905.

It is an arithmetic number, because the mean of its divisors is an integer number (1366356).

Almost surely, 2^12928784 is an apocalyptic number.

It is an amenable number.

12928784 is an abundant number, since it is smaller than the sum of its proper divisors (14398336).

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

12928784 is a wasteful number, since it uses less digits than its factorization.

12928784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73478 (or 73472 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 12928784 is about 3595.6618305953. The cubic root of 12928784 is about 234.7033165611.

The spelling of 12928784 in words is "twelve million, nine hundred twenty-eight thousand, seven hundred eighty-four".