198499868 has 48 divisors (see below), whose sum is σ = 410108160. Its totient is φ = 82301184.

The previous prime is 198499853. The next prime is 198499907. The reversal of 198499868 is 868994891.

It is a self number, because there is not a number n which added to its sum of digits gives 198499868.

It is a congruent number.

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, 135323 + ... + 136781.

It is an arithmetic number, because the mean of its divisors is an integer number (8543920).

Almost surely, 2^198499868 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 198499868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205054080).

198499868 is an abundant number, since it is smaller than the sum of its proper divisors (211608292).

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

198499868 is a wasteful number, since it uses less digits than its factorization.

198499868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1624 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 62.

The square root of 198499868 is about 14088.9981190999. The cubic root of 198499868 is about 583.3377391413.

The spelling of 198499868 in words is "one hundred ninety-eight million, four hundred ninety-nine thousand, eight hundred sixty-eight".