198918812 has 18 divisors (see below), whose sum is σ = 363904968. Its totient is φ = 95134072.

The previous prime is 198918803. The next prime is 198918821. The reversal of 198918812 is 218819891.

It is an interprime number because it is at equal distance from previous prime (198918803) and next prime (198918821).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44888 + ... + 49119.

Almost surely, 2^198918812 is an apocalyptic number.

It is an amenable number.

198918812 is a deficient number, since it is larger than the sum of its proper divisors (164986156).

198918812 is a wasteful number, since it uses less digits than its factorization.

198918812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94057 (or 94032 counting only the distinct ones).

The product of its digits is 82944, while the sum is 47.

The square root of 198918812 is about 14103.8580537383. The cubic root of 198918812 is about 583.7478386878.

The spelling of 198918812 in words is "one hundred ninety-eight million, nine hundred eighteen thousand, eight hundred twelve".