198494188 has 12 divisors (see below), whose sum is σ = 348298720. Its totient is φ = 98980272.

The previous prime is 198494173. The next prime is 198494237. The reversal of 198494188 is 881494891.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 65028 + ... + 68011.

Almost surely, 2^198494188 is an apocalyptic number.

It is an amenable number.

198494188 is a deficient number, since it is larger than the sum of its proper divisors (149804532).

198494188 is a wasteful number, since it uses less digits than its factorization.

198494188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133416 (or 133414 counting only the distinct ones).

The product of its digits is 663552, while the sum is 52.

The square root of 198494188 is about 14088.7965419336. The cubic root of 198494188 is about 583.3321750907.

The spelling of 198494188 in words is "one hundred ninety-eight million, four hundred ninety-four thousand, one hundred eighty-eight".