198889227 has 12 divisors (see below), whose sum is σ = 288891720. Its totient is φ = 131851008.

The previous prime is 198889217. The next prime is 198889259. The reversal of 198889227 is 722988891.

It is not a de Polignac number, because 198889227 - 2⁸ = 198888971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198889217) 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, 60118 + ... + 63339.

It is an arithmetic number, because the mean of its divisors is an integer number (24074310).

Almost surely, 2^198889227 is an apocalyptic number.

198889227 is a deficient number, since it is larger than the sum of its proper divisors (90002493).

198889227 is a wasteful number, since it uses less digits than its factorization.

198889227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123642 (or 123639 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 198889227 is about 14102.8091882433. The cubic root of 198889227 is about 583.7188971716.

The spelling of 198889227 in words is "one hundred ninety-eight million, eight hundred eighty-nine thousand, two hundred twenty-seven".