198521608 has 16 divisors (see below), whose sum is σ = 380148480. Its totient is φ = 97148688.

The previous prime is 198521509. The next prime is 198521627. The reversal of 198521608 is 806125891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263616 + ... + 264367.

It is an arithmetic number, because the mean of its divisors is an integer number (23759280).

Almost surely, 2^198521608 is an apocalyptic number.

It is an amenable number.

198521608 is a deficient number, since it is larger than the sum of its proper divisors (181626872).

198521608 is a wasteful number, since it uses less digits than its factorization.

198521608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528036 (or 528032 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 198521608 is about 14089.7696219633. The cubic root of 198521608 is about 583.3590343688.

The spelling of 198521608 in words is "one hundred ninety-eight million, five hundred twenty-one thousand, six hundred eight".