198919892 has 24 divisors (see below), whose sum is σ = 374959200. Its totient is φ = 92032416.

The previous prime is 198919891. The next prime is 198919921. The reversal of 198919892 is 298919891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198919891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27167 + ... + 33702.

It is an arithmetic number, because the mean of its divisors is an integer number (15623300).

Almost surely, 2^198919892 is an apocalyptic number.

It is an amenable number.

198919892 is a deficient number, since it is larger than the sum of its proper divisors (176039308).

198919892 is a wasteful number, since it uses less digits than its factorization.

198919892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60935 (or 60933 counting only the distinct ones).

The product of its digits is 839808, while the sum is 56.

The square root of 198919892 is about 14103.8963410825. The cubic root of 198919892 is about 583.7488951432.

Subtracting 198919892 from its reverse (298919891), we obtain a palindrome (99999999).

The spelling of 198919892 in words is "one hundred ninety-eight million, nine hundred nineteen thousand, eight hundred ninety-two".