12728464 has 20 divisors (see below), whose sum is σ = 28184704. Its totient is φ = 5455008.

The previous prime is 12728447. The next prime is 12728479. The reversal of 12728464 is 46482721.

It is a happy 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, 56712 + ... + 56935.

Almost surely, 2^12728464 is an apocalyptic number.

12728464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12728464 is an abundant number, since it is smaller than the sum of its proper divisors (15456240).

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

12728464 is a wasteful number, since it uses less digits than its factorization.

12728464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113662 (or 113656 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 12728464 is about 3567.6972965766. The cubic root of 12728464 is about 233.4848286022.

The spelling of 12728464 in words is "twelve million, seven hundred twenty-eight thousand, four hundred sixty-four".