198635812 has 12 divisors (see below), whose sum is σ = 349695360. Its totient is φ = 98722856.

The previous prime is 198635743. The next prime is 198635813. The reversal of 198635812 is 218536891.

It is not an unprimeable number, because it can be changed into a prime (198635813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148012 + ... + 149347.

It is an arithmetic number, because the mean of its divisors is an integer number (29141280).

Almost surely, 2^198635812 is an apocalyptic number.

It is an amenable number.

198635812 is a deficient number, since it is larger than the sum of its proper divisors (151059548).

198635812 is a wasteful number, since it uses less digits than its factorization.

198635812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297530 (or 297528 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 198635812 is about 14093.8217670013. The cubic root of 198635812 is about 583.4708763737.

The spelling of 198635812 in words is "one hundred ninety-eight million, six hundred thirty-five thousand, eight hundred twelve".