198216986 has 16 divisors (see below), whose sum is σ = 324928800. Its totient is φ = 89939280.

The previous prime is 198216947. The next prime is 198217009. The reversal of 198216986 is 689612891.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 5240 + ... + 20588.

It is an arithmetic number, because the mean of its divisors is an integer number (20308050).

Almost surely, 2^198216986 is an apocalyptic number.

198216986 is a deficient number, since it is larger than the sum of its proper divisors (126711814).

198216986 is a wasteful number, since it uses less digits than its factorization.

198216986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15949.

The product of its digits is 373248, while the sum is 50.

The square root of 198216986 is about 14078.9554300026. The cubic root of 198216986 is about 583.0605026910.

The spelling of 198216986 in words is "one hundred ninety-eight million, two hundred sixteen thousand, nine hundred eighty-six".