198441668 has 6 divisors (see below), whose sum is σ = 347272926. Its totient is φ = 99220832.

The previous prime is 198441613. The next prime is 198441701. The reversal of 198441668 is 866144891.

It can be written as a sum of positive squares in only one way, i.e., 174451264 + 23990404 = 13208^2 + 4898^2 .

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 as a sum of consecutive naturals, namely, 24805205 + ... + 24805212.

It is an arithmetic number, because the mean of its divisors is an integer number (57878821).

Almost surely, 2^198441668 is an apocalyptic number.

It is an amenable number.

198441668 is a deficient number, since it is larger than the sum of its proper divisors (148831258).

198441668 is a wasteful number, since it uses less digits than its factorization.

198441668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49610421 (or 49610419 counting only the distinct ones).

The product of its digits is 331776, while the sum is 47.

The square root of 198441668 is about 14086.9325262812. The cubic root of 198441668 is about 583.2807221848.

It can be divided in two parts, 19844 and 1668, that added together give a palindrome (21512).

The spelling of 198441668 in words is "one hundred ninety-eight million, four hundred forty-one thousand, six hundred sixty-eight".