198090668 has 24 divisors (see below), whose sum is σ = 354654384. Its totient is φ = 96782400.

The previous prime is 198090667. The next prime is 198090701. The reversal of 198090668 is 866090891.

198090668 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (198090667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35723 + ... + 40893.

It is an arithmetic number, because the mean of its divisors is an integer number (14777266).

Almost surely, 2^198090668 is an apocalyptic number.

It is an amenable number.

198090668 is a deficient number, since it is larger than the sum of its proper divisors (156563716).

198090668 is a wasteful number, since it uses less digits than its factorization.

198090668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5393 (or 5391 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 198090668 is about 14074.4686578215. The cubic root of 198090668 is about 582.9366204600.

The spelling of 198090668 in words is "one hundred ninety-eight million, ninety thousand, six hundred sixty-eight".