198199908 has 36 divisors (see below), whose sum is σ = 508068288. Its totient is φ = 65135280.

The previous prime is 198199907. The next prime is 198199909. The reversal of 198199908 is 809991891.

It is an interprime number because it is at equal distance from previous prime (198199907) and next prime (198199909).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (198199907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36216 + ... + 41327.

It is an arithmetic number, because the mean of its divisors is an integer number (14113008).

Almost surely, 2^198199908 is an apocalyptic number.

198199908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

198199908 is an abundant number, since it is smaller than the sum of its proper divisors (309868380).

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

198199908 is a wasteful number, since it uses less digits than its factorization.

198199908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77624 (or 77619 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 54.

The square root of 198199908 is about 14078.3489088742. The cubic root of 198199908 is about 583.0437570806.

The spelling of 198199908 in words is "one hundred ninety-eight million, one hundred ninety-nine thousand, nine hundred eight".