12993928 has 8 divisors (see below), whose sum is σ = 24363630. Its totient is φ = 6496960.

The previous prime is 12993917. The next prime is 12993931. The reversal of 12993928 is 82939921.

It can be written as a sum of positive squares in only one way, i.e., 12802084 + 191844 = 3578^2 + 438^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812113 + ... + 812128.

Almost surely, 2^12993928 is an apocalyptic number.

It is an amenable number.

12993928 is a deficient number, since it is larger than the sum of its proper divisors (11369702).

12993928 is a wasteful number, since it uses less digits than its factorization.

12993928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624247 (or 1624243 counting only the distinct ones).

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

The square root of 12993928 is about 3604.7091422194. The cubic root of 12993928 is about 235.0968545986.

The spelling of 12993928 in words is "twelve million, nine hundred ninety-three thousand, nine hundred twenty-eight".