199999888 has 20 divisors (see below), whose sum is σ = 422727408. Its totient is φ = 90908960.

The previous prime is 199999853. The next prime is 199999889. The reversal of 199999888 is 888999991.

199999888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (199999889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568006 + ... + 568357.

Almost surely, 2^199999888 is an apocalyptic number.

It is an amenable number.

199999888 is an abundant number, since it is smaller than the sum of its proper divisors (222727520).

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

199999888 is a wasteful number, since it uses less digits than its factorization.

199999888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136382 (or 1136376 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 70.

The square root of 199999888 is about 14142.1316639324. The cubic root of 199999888 is about 584.8034384792.

The spelling of 199999888 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred eighty-eight".