198688912 has 20 divisors (see below), whose sum is σ = 385467516. Its totient is φ = 99213440.

The previous prime is 198688907. The next prime is 198688913. The reversal of 198688912 is 219886891.

It can be written as a sum of positive squares in 2 ways, for example, as 78216336 + 120472576 = 8844^2 + 10976^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 198688912.

It is not an unprimeable number, because it can be changed into a prime (198688913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4962 + ... + 20542.

Almost surely, 2^198688912 is an apocalyptic number.

It is an amenable number.

198688912 is a deficient number, since it is larger than the sum of its proper divisors (186778604).

198688912 is a wasteful number, since it uses less digits than its factorization.

198688912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16386 (or 16380 counting only the distinct ones).

The product of its digits is 497664, while the sum is 52.

The square root of 198688912 is about 14095.7054452766. The cubic root of 198688912 is about 583.5228635471.

The spelling of 198688912 in words is "one hundred ninety-eight million, six hundred eighty-eight thousand, nine hundred twelve".