12739938 has 16 divisors (see below), whose sum is σ = 25733376. Its totient is φ = 4204400.

The previous prime is 12739931. The next prime is 12739939. The reversal of 12739938 is 83993721.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12739938.

It is not an unprimeable number, because it can be changed into a prime (12739931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9906 + ... + 11117.

It is an arithmetic number, because the mean of its divisors is an integer number (1608336).

Almost surely, 2^12739938 is an apocalyptic number.

12739938 is an abundant number, since it is smaller than the sum of its proper divisors (12993438).

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

12739938 is a wasteful number, since it uses less digits than its factorization.

12739938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21129.

The product of its digits is 81648, while the sum is 42.

The square root of 12739938 is about 3569.3049743613. The cubic root of 12739938 is about 233.5549653795.

It can be divided in two parts, 1273 and 9938, that added together give a palindrome (11211).

The spelling of 12739938 in words is "twelve million, seven hundred thirty-nine thousand, nine hundred thirty-eight".