12011904 has 48 divisors (see below), whose sum is σ = 34568820. Its totient is φ = 4003584.

The previous prime is 12011903. The next prime is 12011917. The reversal of 12011904 is 40911021.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4062 + ... + 6365.

Almost surely, 2^12011904 is an apocalyptic number.

It is an amenable number.

12011904 is an abundant number, since it is smaller than the sum of its proper divisors (22556916).

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

12011904 is a wasteful number, since it uses less digits than its factorization.

12011904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10447 (or 10432 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 12011904 is about 3465.8193836379. The cubic root of 12011904 is about 229.0185272603.

Adding to 12011904 its reverse (40911021), we get a palindrome (52922925).

The spelling of 12011904 in words is "twelve million, eleven thousand, nine hundred four".