163604 has 12 divisors (see below), whose sum is σ = 327264. Its totient is φ = 70104.

The previous prime is 163601. The next prime is 163613. The reversal of 163604 is 406361.

163604 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2894 + ... + 2949.

It is an arithmetic number, because the mean of its divisors is an integer number (27272).

2¹⁶³⁶⁰⁴ is an apocalyptic number.

163604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

163604 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

163604 is a wasteful number, since it uses less digits than its factorization.

163604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5854 (or 5852 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 163604 is about 404.4799129747. The cubic root of 163604 is about 54.6929446008.

Adding to 163604 its reverse (406361), we get a palindrome (569965).

It can be divided in two parts, 163 and 604, that added together give a palindrome (767).

The spelling of 163604 in words is "one hundred sixty-three thousand, six hundred four".