198198 has 72 divisors (see below), whose sum is σ = 580944. Its totient is φ = 47520.

The previous prime is 198197. The next prime is 198221. The reversal of 198198 is 891891.

198198 is nontrivially palindromic in base 15.

Its product of digits (5184) is a multiple of the sum of its prime divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198193) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15240 + ... + 15252.

2¹⁹⁸¹⁹⁸ is an apocalyptic number.

198198 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 198198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290472).

198198 is an abundant number, since it is smaller than the sum of its proper divisors (382746).

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

198198 is a wasteful number, since it uses less digits than its factorization.

198198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50 (or 36 counting only the distinct ones).

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

The square root of 198198 is about 445.1943395867. The cubic root of 198198 is about 58.3041886156.

The spelling of 198198 in words is "one hundred ninety-eight thousand, one hundred ninety-eight".