198555822 has 24 divisors (see below), whose sum is σ = 430475760. Its totient is φ = 66143520.

The previous prime is 198555821. The next prime is 198555823. The reversal of 198555822 is 228555891.

It is a happy number.

198555822 is a `hidden beast` number, since 1 + 98 + 5 + 558 + 2 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (198555821) and next prime (198555823).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198555821) 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 11 ways as a sum of consecutive naturals, for example, 41679 + ... + 46197.

It is an arithmetic number, because the mean of its divisors is an integer number (17936490).

Almost surely, 2^198555822 is an apocalyptic number.

198555822 is an abundant number, since it is smaller than the sum of its proper divisors (231919938).

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

198555822 is a wasteful number, since it uses less digits than its factorization.

198555822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6968 (or 6965 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The square root of 198555822 is about 14090.9837129989. The cubic root of 198555822 is about 583.3925452457.

The spelling of 198555822 in words is "one hundred ninety-eight million, five hundred fifty-five thousand, eight hundred twenty-two".