188404 has 24 divisors (see below), whose sum is σ = 361760. Its totient is φ = 85536.

The previous prime is 188401. The next prime is 188407. The reversal of 188404 is 404881.

188404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (188401) and next prime (188407).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2779 + ... + 2845.

2¹⁸⁸⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

188404 is a deficient number, since it is larger than the sum of its proper divisors (173356).

188404 is a wasteful number, since it uses less digits than its factorization.

188404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 188404 is about 434.0552960165. The cubic root of 188404 is about 57.3275488425.

The spelling of 188404 in words is "one hundred eighty-eight thousand, four hundred four".