12439904 has 24 divisors (see below), whose sum is σ = 24691968. Its totient is φ = 6168960.

The previous prime is 12439879. The next prime is 12439907. The reversal of 12439904 is 40993421.

It is a happy number.

12439904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12439907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2534 + ... + 5594.

It is an arithmetic number, because the mean of its divisors is an integer number (1028832).

Almost surely, 2^12439904 is an apocalyptic number.

It is an amenable number.

12439904 is a deficient number, since it is larger than the sum of its proper divisors (12252064).

12439904 is a wasteful number, since it uses less digits than its factorization.

12439904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198 (or 3190 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 12439904 is about 3527.0248085320. The cubic root of 12439904 is about 231.7069228274.

The spelling of 12439904 in words is "twelve million, four hundred thirty-nine thousand, nine hundred four".