198009616 has 20 divisors (see below), whose sum is σ = 438450112. Its totient is φ = 84861216.

The previous prime is 198009613. The next prime is 198009619. The reversal of 198009616 is 616900891.

It is an interprime number because it is at equal distance from previous prime (198009613) and next prime (198009619).

It is not an unprimeable number, because it can be changed into a prime (198009611) by changing a digit.

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, 883860 + ... + 884083.

Almost surely, 2^198009616 is an apocalyptic number.

198009616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

198009616 is an abundant number, since it is smaller than the sum of its proper divisors (240440496).

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

198009616 is a wasteful number, since it uses less digits than its factorization.

198009616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767958 (or 1767952 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 198009616 is about 14071.5889650032. The cubic root of 198009616 is about 582.8571036323.

The spelling of 198009616 in words is "one hundred ninety-eight million, nine thousand, six hundred sixteen".