198720912 has 80 divisors (see below), whose sum is σ = 570741248. Its totient is φ = 59166720.

The previous prime is 198720901. The next prime is 198720941. The reversal of 198720912 is 219027891.

198720912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×198720912² = 78980001732223488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 14208 + ... + 24480.

Almost surely, 2^198720912 is an apocalyptic number.

198720912 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 198720912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285370624).

198720912 is an abundant number, since it is smaller than the sum of its proper divisors (372020336).

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

198720912 is a wasteful number, since it uses less digits than its factorization.

198720912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10328 (or 10322 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 198720912 is about 14096.8404970759. The cubic root of 198720912 is about 583.5541884443.

The spelling of 198720912 in words is "one hundred ninety-eight million, seven hundred twenty thousand, nine hundred twelve".