12939238 has 8 divisors (see below), whose sum is σ = 20901888. Its totient is φ = 5971944.

The previous prime is 12939217. The next prime is 12939257. The reversal of 12939238 is 83293921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12939197 and 12939206.

It is a congruent 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, 248806 + ... + 248857.

It is an arithmetic number, because the mean of its divisors is an integer number (2612736).

Almost surely, 2^12939238 is an apocalyptic number.

12939238 is a deficient number, since it is larger than the sum of its proper divisors (7962650).

12939238 is a wasteful number, since it uses less digits than its factorization.

12939238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497678.

The product of its digits is 23328, while the sum is 37.

The square root of 12939238 is about 3597.1152330722. The cubic root of 12939238 is about 234.7665585865.

The spelling of 12939238 in words is "twelve million, nine hundred thirty-nine thousand, two hundred thirty-eight".