13604004 has 24 divisors (see below), whose sum is σ = 35269920. Its totient is φ = 4534632.

The previous prime is 13603979. The next prime is 13604011. The reversal of 13604004 is 40040631.

13604004 is digitally balanced in base 2 and base 4, because in such bases 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 (18).

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, 62874 + ... + 63089.

It is an arithmetic number, because the mean of its divisors is an integer number (1469580).

Almost surely, 2^13604004 is an apocalyptic number.

It is an amenable number.

13604004 is an abundant number, since it is smaller than the sum of its proper divisors (21665916).

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

13604004 is a wasteful number, since it uses less digits than its factorization.

13604004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125976 (or 125968 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13604004 is about 3688.3606114370. The cubic root of 13604004 is about 238.7200611198.

Adding to 13604004 its reverse (40040631), we get a palindrome (53644635).

The spelling of 13604004 in words is "thirteen million, six hundred four thousand, four".