12739392 has 84 divisors (see below), whose sum is σ = 38692836. Its totient is φ = 3993600.

The previous prime is 12739387. The next prime is 12739393. The reversal of 12739392 is 29393721.

It can be written as a sum of positive squares in 2 ways, for example, as 3594816 + 9144576 = 1896^2 + 3024^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9142 + ... + 10442.

It is an arithmetic number, because the mean of its divisors is an integer number (460629).

Almost surely, 2^12739392 is an apocalyptic number.

12739392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12739392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19346418).

12739392 is an abundant number, since it is smaller than the sum of its proper divisors (25953444).

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

12739392 is a wasteful number, since it uses less digits than its factorization.

12739392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336 (or 1323 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 12739392 is about 3569.2284880629. The cubic root of 12739392 is about 233.5516288161.

It can be divided in two parts, 12739 and 392, that added together give a palindrome (13131).

The spelling of 12739392 in words is "twelve million, seven hundred thirty-nine thousand, three hundred ninety-two".