198992188 has 12 divisors (see below), whose sum is σ = 356730192. Its totient is φ = 97069280.

The previous prime is 198992093. The next prime is 198992207. The reversal of 198992188 is 881299891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606520 + ... + 606847.

It is an arithmetic number, because the mean of its divisors is an integer number (29727516).

Almost surely, 2^198992188 is an apocalyptic number.

It is an amenable number.

198992188 is a deficient number, since it is larger than the sum of its proper divisors (157738004).

198992188 is a wasteful number, since it uses less digits than its factorization.

198992188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213412 (or 1213410 counting only the distinct ones).

The product of its digits is 746496, while the sum is 55.

The square root of 198992188 is about 14106.4590879497. The cubic root of 198992188 is about 583.8196063525.

The spelling of 198992188 in words is "one hundred ninety-eight million, nine hundred ninety-two thousand, one hundred eighty-eight".