199938568 has 16 divisors (see below), whose sum is σ = 376382160. Its totient is φ = 99570000.

The previous prime is 199938533. The next prime is 199938587. The reversal of 199938568 is 865839991.

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 3 ways as a sum of consecutive naturals, for example, 47778 + ... + 51793.

It is an arithmetic number, because the mean of its divisors is an integer number (23523885).

Almost surely, 2^199938568 is an apocalyptic number.

It is an amenable number.

199938568 is a deficient number, since it is larger than the sum of its proper divisors (176443592).

199938568 is a wasteful number, since it uses less digits than its factorization.

199938568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99828 (or 99824 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 58.

The square root of 199938568 is about 14139.9635077323. The cubic root of 199938568 is about 584.7436654251.

It can be divided in two parts, 19993 and 8568, that added together give a 4-th power (28561 = 13⁴).

The spelling of 199938568 in words is "one hundred ninety-nine million, nine hundred thirty-eight thousand, five hundred sixty-eight".