198618198 has 16 divisors (see below), whose sum is σ = 398323200. Its totient is φ = 66024936.

The previous prime is 198618163. The next prime is 198618223. The reversal of 198618198 is 891816891.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 198618198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42898 + ... + 47301.

It is an arithmetic number, because the mean of its divisors is an integer number (24895200).

Almost surely, 2^198618198 is an apocalyptic number.

198618198 is an abundant number, since it is smaller than the sum of its proper divisors (199705002).

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

198618198 is a wasteful number, since it uses less digits than its factorization.

198618198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90571.

The product of its digits is 248832, while the sum is 51.

The square root of 198618198 is about 14093.1968694119. The cubic root of 198618198 is about 583.4536294672.

The spelling of 198618198 in words is "one hundred ninety-eight million, six hundred eighteen thousand, one hundred ninety-eight".