12728392 has 16 divisors (see below), whose sum is σ = 24222960. Its totient is φ = 6268944.

The previous prime is 12728389. The next prime is 12728447. The reversal of 12728392 is 29382721.

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, 11338 + ... + 12409.

It is an arithmetic number, because the mean of its divisors is an integer number (1513935).

Almost surely, 2^12728392 is an apocalyptic number.

It is an amenable number.

12728392 is a deficient number, since it is larger than the sum of its proper divisors (11494568).

12728392 is a wasteful number, since it uses less digits than its factorization.

12728392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23820 (or 23816 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 12728392 is about 3567.6872060202. The cubic root of 12728392 is about 233.4843883569.

The spelling of 12728392 in words is "twelve million, seven hundred twenty-eight thousand, three hundred ninety-two".