13604 has 12 divisors (see below), whose sum is σ = 25200. Its totient is φ = 6408.

The previous prime is 13597. The next prime is 13613. The reversal of 13604 is 40631.

It is a nialpdrome in base 7.

It is an unprimeable number.

13604 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14 + ... + 165.

It is an arithmetic number, because the mean of its divisors is an integer number (2100).

2¹³⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

13604 is a deficient number, since it is larger than the sum of its proper divisors (11596).

13604 is a wasteful number, since it uses less digits than its factorization.

13604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 13604 is about 116.6361864946. The cubic root of 13604 is about 23.8720037723.

The spelling of 13604 in words is "thirteen thousand, six hundred four".