198648868 has 24 divisors (see below), whose sum is σ = 391474944. Its totient is φ = 87381600.

The previous prime is 198648851. The next prime is 198648871. The reversal of 198648868 is 868846891.

It is a super-2 number, since 2×198648868² = 78922745515362848, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71455 + ... + 74182.

It is an arithmetic number, because the mean of its divisors is an integer number (16311456).

Almost surely, 2^198648868 is an apocalyptic number.

It is an amenable number.

198648868 is a deficient number, since it is larger than the sum of its proper divisors (192826076).

198648868 is a wasteful number, since it uses less digits than its factorization.

198648868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145683 (or 145681 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 58.

The square root of 198648868 is about 14094.2849410674. The cubic root of 198648868 is about 583.4836596155.

The spelling of 198648868 in words is "one hundred ninety-eight million, six hundred forty-eight thousand, eight hundred sixty-eight".