12391944 has 32 divisors (see below), whose sum is σ = 31305120. Its totient is φ = 4087296.

The previous prime is 12391937. The next prime is 12391987. The reversal of 12391944 is 44919321.

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, 334 + ... + 4989.

It is an arithmetic number, because the mean of its divisors is an integer number (978285).

Almost surely, 2^12391944 is an apocalyptic number.

It is an amenable number.

12391944 is an abundant number, since it is smaller than the sum of its proper divisors (18913176).

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

12391944 is a wasteful number, since it uses less digits than its factorization.

12391944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5429 (or 5425 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 12391944 is about 3520.2193113498. The cubic root of 12391944 is about 231.4087700523.

The spelling of 12391944 in words is "twelve million, three hundred ninety-one thousand, nine hundred forty-four".