198882918 has 192 divisors, whose sum is σ = 534067200. Its totient is φ = 54587520.

The previous prime is 198882917. The next prime is 198882919. The reversal of 198882918 is 819288891.

It is an interprime number because it is at equal distance from previous prime (198882917) and next prime (198882919).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198882911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5375196 + ... + 5375232.

It is an arithmetic number, because the mean of its divisors is an integer number (2781600).

Almost surely, 2^198882918 is an apocalyptic number.

198882918 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 198882918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267033600).

198882918 is an abundant number, since it is smaller than the sum of its proper divisors (335184282).

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

198882918 is a wasteful number, since it uses less digits than its factorization.

198882918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 105 counting only the distinct ones).

The product of its digits is 663552, while the sum is 54.

The square root of 198882918 is about 14102.5855076294. The cubic root of 198882918 is about 583.7127250232.

The spelling of 198882918 in words is "one hundred ninety-eight million, eight hundred eighty-two thousand, nine hundred eighteen".