12739438 has 16 divisors (see below), whose sum is σ = 20036016. Its totient is φ = 6068160.

The previous prime is 12739429. The next prime is 12739471. The reversal of 12739438 is 83493721.

12739438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12739397 and 12739406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1720 + ... + 5332.

It is an arithmetic number, because the mean of its divisors is an integer number (1252251).

Almost surely, 2^12739438 is an apocalyptic number.

12739438 is a deficient number, since it is larger than the sum of its proper divisors (7296578).

12739438 is a wasteful number, since it uses less digits than its factorization.

12739438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3699.

The product of its digits is 36288, while the sum is 37.

The square root of 12739438 is about 3569.2349320268. The cubic root of 12739438 is about 233.5519099222.

The spelling of 12739438 in words is "twelve million, seven hundred thirty-nine thousand, four hundred thirty-eight".