163404 has 48 divisors (see below), whose sum is σ = 453600. Its totient is φ = 50688.

The previous prime is 163403. The next prime is 163409. The reversal of 163404 is 404361.

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

It is not an unprimeable number, because it can be changed into a prime (163403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1792 + ... + 1880.

It is an arithmetic number, because the mean of its divisors is an integer number (9450).

2¹⁶³⁴⁰⁴ 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 163404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226800).

163404 is an abundant number, since it is smaller than the sum of its proper divisors (290196).

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

163404 is a wasteful number, since it uses less digits than its factorization.

163404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 111 counting only the distinct ones).

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

The square root of 163404 is about 404.2326063048. The cubic root of 163404 is about 54.6706487945.

Adding to 163404 its reverse (404361), we get a palindrome (567765).

The spelling of 163404 in words is "one hundred sixty-three thousand, four hundred four".