12738444 has 24 divisors (see below), whose sum is σ = 30285360. Its totient is φ = 4165824.

The previous prime is 12738443. The next prime is 12738469. The reversal of 12738444 is 44483721.

12738444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12738444² = 324535911082272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12738443) 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, 9379 + ... + 10650.

It is an arithmetic number, because the mean of its divisors is an integer number (1261890).

Almost surely, 2^12738444 is an apocalyptic number.

It is an amenable number.

12738444 is an abundant number, since it is smaller than the sum of its proper divisors (17546916).

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

12738444 is a wasteful number, since it uses less digits than its factorization.

12738444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20089 (or 20087 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 12738444 is about 3569.0956837832. The cubic root of 12738444 is about 233.5458354356.

The spelling of 12738444 in words is "twelve million, seven hundred thirty-eight thousand, four hundred forty-four".