198459198 has 48 divisors (see below), whose sum is σ = 494029536. Its totient is φ = 56401920.

The previous prime is 198459197. The next prime is 198459221. The reversal of 198459198 is 891954891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198459193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20238 + ... + 28398.

It is an arithmetic number, because the mean of its divisors is an integer number (10292282).

Almost surely, 2^198459198 is an apocalyptic number.

198459198 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 198459198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247014768).

198459198 is an abundant number, since it is smaller than the sum of its proper divisors (295570338).

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

198459198 is a wasteful number, since it uses less digits than its factorization.

198459198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8369 (or 8366 counting only the distinct ones).

The product of its digits is 933120, while the sum is 54.

The square root of 198459198 is about 14087.5547203906. The cubic root of 198459198 is about 583.2978970220.

The spelling of 198459198 in words is "one hundred ninety-eight million, four hundred fifty-nine thousand, one hundred ninety-eight".