198915912 has 192 divisors, whose sum is σ = 638426880. Its totient is φ = 57480192.

The previous prime is 198915907. The next prime is 198915931. The reversal of 198915912 is 219519891.

198915912 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 429393 + ... + 429855.

It is an arithmetic number, because the mean of its divisors is an integer number (3325140).

Almost surely, 2^198915912 is an apocalyptic number.

198915912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198915912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319213440).

198915912 is an abundant number, since it is smaller than the sum of its proper divisors (439510968).

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

198915912 is a wasteful number, since it uses less digits than its factorization.

198915912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 498 counting only the distinct ones).

The product of its digits is 58320, while the sum is 45.

The square root of 198915912 is about 14103.7552446148. The cubic root of 198915912 is about 583.7450018907.

The spelling of 198915912 in words is "one hundred ninety-eight million, nine hundred fifteen thousand, nine hundred twelve".