199998768 has 20 divisors (see below), whose sum is σ = 516663608. Its totient is φ = 66666240.

The previous prime is 199998751. The next prime is 199998791. The reversal of 199998768 is 867899991.

It is a junction number, because it is equal to n+sod(n) for n = 199998699 and 199998708.

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 in 3 ways as a sum of consecutive naturals, for example, 2083273 + ... + 2083368.

Almost surely, 2^199998768 is an apocalyptic number.

It is an amenable number.

199998768 is an abundant number, since it is smaller than the sum of its proper divisors (316664840).

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

199998768 is a wasteful number, since it uses less digits than its factorization.

199998768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166652 (or 4166646 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 66.

The square root of 199998768 is about 14142.0920658862. The cubic root of 199998768 is about 584.8023468435.

The spelling of 199998768 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, seven hundred sixty-eight".