198970218 has 24 divisors (see below), whose sum is σ = 445968900. Its totient is φ = 64036224.

The previous prime is 198970207. The next prime is 198970229. The reversal of 198970218 is 812079891.

It is an interprime number because it is at equal distance from previous prime (198970207) and next prime (198970229).

It can be written as a sum of positive squares in 2 ways, for example, as 192016449 + 6953769 = 13857^2 + 2637^2 .

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, 190063 + ... + 191106.

Almost surely, 2^198970218 is an apocalyptic number.

198970218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

198970218 is an abundant number, since it is smaller than the sum of its proper divisors (246998682).

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

198970218 is a wasteful number, since it uses less digits than its factorization.

198970218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381206 (or 381203 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 198970218 is about 14105.6803451659. The cubic root of 198970218 is about 583.7981197656.

The spelling of 198970218 in words is "one hundred ninety-eight million, nine hundred seventy thousand, two hundred eighteen".