198664908 has 36 divisors (see below), whose sum is σ = 501957288. Its totient is φ = 61127040.

The previous prime is 198664891. The next prime is 198664913. The reversal of 198664908 is 809466891.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46953 + ... + 51008.

It is an arithmetic number, because the mean of its divisors is an integer number (13943258).

Almost surely, 2^198664908 is an apocalyptic number.

It is an amenable number.

198664908 is an abundant number, since it is smaller than the sum of its proper divisors (303292380).

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

198664908 is a wasteful number, since it uses less digits than its factorization.

198664908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97994 (or 97979 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 198664908 is about 14094.8539545467. The cubic root of 198664908 is about 583.4993637507.

The spelling of 198664908 in words is "one hundred ninety-eight million, six hundred sixty-four thousand, nine hundred eight".