198721182 has 32 divisors (see below), whose sum is σ = 439073280. Its totient is φ = 59454720.

The previous prime is 198721169. The next prime is 198721199. The reversal of 198721182 is 281127891.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 198721182.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13843 + ... + 24270.

It is an arithmetic number, because the mean of its divisors is an integer number (13721040).

Almost surely, 2^198721182 is an apocalyptic number.

198721182 is an abundant number, since it is smaller than the sum of its proper divisors (240352098).

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

198721182 is a wasteful number, since it uses less digits than its factorization.

198721182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38208.

The product of its digits is 16128, while the sum is 39.

The square root of 198721182 is about 14096.8500736867. The cubic root of 198721182 is about 583.5544527338.

The spelling of 198721182 in words is "one hundred ninety-eight million, seven hundred twenty-one thousand, one hundred eighty-two".