209830198 has 8 divisors (see below), whose sum is σ = 319443192. Its totient is φ = 103349136.

The previous prime is 209830163. The next prime is 209830207. The reversal of 209830198 is 891038902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 209830198.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782815 + ... + 783082.

It is an arithmetic number, because the mean of its divisors is an integer number (39930399).

Almost surely, 2^209830198 is an apocalyptic number.

209830198 is a deficient number, since it is larger than the sum of its proper divisors (109612994).

209830198 is a wasteful number, since it uses less digits than its factorization.

209830198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565966.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 209830198 is about 14485.5168357915. The cubic root of 209830198 is about 594.2319473416.

The spelling of 209830198 in words is "two hundred nine million, eight hundred thirty thousand, one hundred ninety-eight".