198665192 has 16 divisors (see below), whose sum is σ = 406360800. Its totient is φ = 90302320.

The previous prime is 198665183. The next prime is 198665209. The reversal of 198665192 is 291566891.

It is a happy number.

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, 1128692 + ... + 1128867.

It is an arithmetic number, because the mean of its divisors is an integer number (25397550).

Almost surely, 2^198665192 is an apocalyptic number.

It is an amenable number.

198665192 is an abundant number, since it is smaller than the sum of its proper divisors (207695608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198665192 is a wasteful number, since it uses less digits than its factorization.

198665192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257576 (or 2257572 counting only the distinct ones).

The product of its digits is 233280, while the sum is 47.

The square root of 198665192 is about 14094.8640291420. The cubic root of 198665192 is about 583.4996417963.

The spelling of 198665192 in words is "one hundred ninety-eight million, six hundred sixty-five thousand, one hundred ninety-two".