198191168 has 112 divisors (see below), whose sum is σ = 485875584. Its totient is φ = 78274560.

The previous prime is 198191143. The next prime is 198191173. The reversal of 198191168 is 861191891.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403403 + ... + 403893.

Almost surely, 2^198191168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198191168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242937792).

198191168 is an abundant number, since it is smaller than the sum of its proper divisors (287684416).

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

198191168 is a wasteful number, since it uses less digits than its factorization.

198191168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 570 counting only the distinct ones).

The product of its digits is 31104, while the sum is 44.

The square root of 198191168 is about 14078.0384997343. The cubic root of 198191168 is about 583.0351868154.

The spelling of 198191168 in words is "one hundred ninety-eight million, one hundred ninety-one thousand, one hundred sixty-eight".