198723868 has 24 divisors (see below), whose sum is σ = 402483200. Its totient is φ = 84088368.

The previous prime is 198723853. The next prime is 198723913. The reversal of 198723868 is 868327891.

It is a congruent number.

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, 42708 + ... + 47131.

Almost surely, 2^198723868 is an apocalyptic number.

It is an amenable number.

198723868 is an abundant number, since it is smaller than the sum of its proper divisors (203759332).

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

198723868 is a wasteful number, since it uses less digits than its factorization.

198723868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89929 (or 89927 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 52.

The square root of 198723868 is about 14096.9453428748. The cubic root of 198723868 is about 583.5570819120.

The spelling of 198723868 in words is "one hundred ninety-eight million, seven hundred twenty-three thousand, eight hundred sixty-eight".