12668435928 has 48 divisors (see below), whose sum is σ = 34580532480. Its totient is φ = 4189558464.

The previous prime is 12668435917. The next prime is 12668435981. The reversal of 12668435928 is 82953486621.

12668435928 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 8 + 43 + 592 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 683575 + ... + 701862.

It is an arithmetic number, because the mean of its divisors is an integer number (720427760).

Almost surely, 2^12668435928 is an apocalyptic number.

12668435928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12668435928 is an abundant number, since it is smaller than the sum of its proper divisors (21912096552).

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

12668435928 is a wasteful number, since it uses less digits than its factorization.

12668435928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385576 (or 1385569 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 12668435928 in words is "twelve billion, six hundred sixty-eight million, four hundred thirty-five thousand, nine hundred twenty-eight".