198856218 has 32 divisors (see below), whose sum is σ = 440989632. Its totient is φ = 59270400.

The previous prime is 198856213. The next prime is 198856243. The reversal of 198856218 is 812658891.

It is not an unprimeable number, because it can be changed into a prime (198856213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20671 + ... + 28722.

It is an arithmetic number, because the mean of its divisors is an integer number (13780926).

Almost surely, 2^198856218 is an apocalyptic number.

198856218 is an abundant number, since it is smaller than the sum of its proper divisors (242133414).

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

198856218 is a wasteful number, since it uses less digits than its factorization.

198856218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49470.

The product of its digits is 276480, while the sum is 48.

The square root of 198856218 is about 14101.6388409291. The cubic root of 198856218 is about 583.6866027408.

The spelling of 198856218 in words is "one hundred ninety-eight million, eight hundred fifty-six thousand, two hundred eighteen".