189198 has 24 divisors (see below), whose sum is σ = 428688. Its totient is φ = 60192.

The previous prime is 189187. The next prime is 189199. The reversal of 189198 is 891981.

189198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186 + ... + 642.

It is an arithmetic number, because the mean of its divisors is an integer number (17862).

2¹⁸⁹¹⁹⁸ is an apocalyptic number.

189198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214344).

189198 is an abundant number, since it is smaller than the sum of its proper divisors (239490).

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

189198 is a wasteful number, since it uses less digits than its factorization.

189198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 485 counting only the distinct ones).

The product of its digits is 5184, while the sum is 36.

The square root of 189198 is about 434.9689644101. The cubic root of 189198 is about 57.4079687205.

It can be divided in two parts, 18 and 9198, that added together give a square (9216 = 96²).

The spelling of 189198 in words is "one hundred eighty-nine thousand, one hundred ninety-eight".