12939928 has 16 divisors (see below), whose sum is σ = 24854760. Its totient is φ = 6312000.

The previous prime is 12939923. The next prime is 12939929. The reversal of 12939928 is 82993921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12939923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19398 + ... + 20053.

Almost surely, 2^12939928 is an apocalyptic number.

It is an amenable number.

12939928 is a deficient number, since it is larger than the sum of its proper divisors (11914832).

12939928 is a wasteful number, since it uses less digits than its factorization.

12939928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39498 (or 39494 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 12939928 is about 3597.2111419821. The cubic root of 12939928 is about 234.7707315794.

The spelling of 12939928 in words is "twelve million, nine hundred thirty-nine thousand, nine hundred twenty-eight".