12928456 has 8 divisors (see below), whose sum is σ = 24240870. Its totient is φ = 6464224.

The previous prime is 12928439. The next prime is 12928459. The reversal of 12928456 is 65482921.

It can be written as a sum of positive squares in only one way, i.e., 8236900 + 4691556 = 2870^2 + 2166^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12928459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808021 + ... + 808036.

Almost surely, 2^12928456 is an apocalyptic number.

It is an amenable number.

12928456 is a deficient number, since it is larger than the sum of its proper divisors (11312414).

12928456 is a wasteful number, since it uses less digits than its factorization.

12928456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616063 (or 1616059 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 12928456 is about 3595.6162197876. The cubic root of 12928456 is about 234.7013317563.

The spelling of 12928456 in words is "twelve million, nine hundred twenty-eight thousand, four hundred fifty-six".