12043904 has 32 divisors (see below), whose sum is σ = 25043040. Its totient is φ = 5758720.

The previous prime is 12043831. The next prime is 12043909. The reversal of 12043904 is 40934021.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×12043904² = 290111247122432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 12043904.

It is not an unprimeable number, because it can be changed into a prime (12043909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 899 + ... + 4989.

It is an arithmetic number, because the mean of its divisors is an integer number (782595).

Almost surely, 2^12043904 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 12043904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12521520).

12043904 is an abundant number, since it is smaller than the sum of its proper divisors (12999136).

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

12043904 is an equidigital number, since it uses as much as digits as its factorization.

12043904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128 (or 4116 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 12043904 is about 3470.4328260319. The cubic root of 12043904 is about 229.2217172136.

Adding to 12043904 its reverse (40934021), we get a palindrome (52977925).

The spelling of 12043904 in words is "twelve million, forty-three thousand, nine hundred four".