198904 has 24 divisors (see below), whose sum is σ = 398160. Its totient is φ = 93104.

The previous prime is 198901. The next prime is 198929. The reversal of 198904 is 409891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4209 + ... + 4255.

It is an arithmetic number, because the mean of its divisors is an integer number (16590).

2¹⁹⁸⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

198904 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.

198904 is a wasteful number, since it uses less digits than its factorization.

198904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 198904 is about 445.9865468823. The cubic root of 198904 is about 58.3733349213.

The spelling of 198904 in words is "one hundred ninety-eight thousand, nine hundred four".