198340186 has 8 divisors (see below), whose sum is σ = 324556704. Its totient is φ = 90154620.

The previous prime is 198340169. The next prime is 198340231. The reversal of 198340186 is 681043891.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4507710 + ... + 4507753.

It is an arithmetic number, because the mean of its divisors is an integer number (40569588).

Almost surely, 2^198340186 is an apocalyptic number.

198340186 is a deficient number, since it is larger than the sum of its proper divisors (126216518).

198340186 is a wasteful number, since it uses less digits than its factorization.

198340186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9015476.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 198340186 is about 14083.3300749503. The cubic root of 198340186 is about 583.1812763578.

The spelling of 198340186 in words is "one hundred ninety-eight million, three hundred forty thousand, one hundred eighty-six".