198412220 has 12 divisors (see below), whose sum is σ = 416665704. Its totient is φ = 79364880.

The previous prime is 198412217. The next prime is 198412223. The reversal of 198412220 is 22214891.

It is an interprime number because it is at equal distance from previous prime (198412217) and next prime (198412223).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198412223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4960286 + ... + 4960325.

It is an arithmetic number, because the mean of its divisors is an integer number (34722142).

Almost surely, 2^198412220 is an apocalyptic number.

198412220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198412220 is an abundant number, since it is smaller than the sum of its proper divisors (218253484).

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

198412220 is a wasteful number, since it uses less digits than its factorization.

198412220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9920620 (or 9920618 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 198412220 is about 14085.8872634989. The cubic root of 198412220 is about 583.2518685329.

The spelling of 198412220 in words is "one hundred ninety-eight million, four hundred twelve thousand, two hundred twenty".