12309904 has 40 divisors (see below), whose sum is σ = 25498368. Its totient is φ = 5736960.

The previous prime is 12309893. The next prime is 12309907. The reversal of 12309904 is 40990321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12309907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45289 + ... + 45559.

Almost surely, 2^12309904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12309904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12749184).

12309904 is an abundant number, since it is smaller than the sum of its proper divisors (13188464).

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

12309904 is a wasteful number, since it uses less digits than its factorization.

12309904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 12309904 is about 3508.5472777205. The cubic root of 12309904 is about 230.8969637243.

The spelling of 12309904 in words is "twelve million, three hundred nine thousand, nine hundred four".