12717928 has 16 divisors (see below), whose sum is σ = 23972580. Its totient is φ = 6325248.

The previous prime is 12717923. The next prime is 12717937. The reversal of 12717928 is 82971721.

It can be written as a sum of positive squares in 2 ways, for example, as 12659364 + 58564 = 3558^2 + 242^2 .

It is a super-2 number, since 2×12717928² = 323491385226368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12717923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2575 + ... + 5662.

Almost surely, 2^12717928 is an apocalyptic number.

It is an amenable number.

12717928 is a deficient number, since it is larger than the sum of its proper divisors (11254652).

12717928 is a wasteful number, since it uses less digits than its factorization.

12717928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8436 (or 8432 counting only the distinct ones).

The product of its digits is 14112, while the sum is 37.

The square root of 12717928 is about 3566.2204082193. The cubic root of 12717928 is about 233.4203883780.

The spelling of 12717928 in words is "twelve million, seven hundred seventeen thousand, nine hundred twenty-eight".