199389768 has 64 divisors (see below), whose sum is σ = 517017600. Its totient is φ = 64011840.

The previous prime is 199389767. The next prime is 199389793. The reversal of 199389768 is 867983991.

It is not an unprimeable number, because it can be changed into a prime (199389767) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 195163 + ... + 196181.

It is an arithmetic number, because the mean of its divisors is an integer number (8078400).

Almost surely, 2^199389768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199389768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258508800).

199389768 is an abundant number, since it is smaller than the sum of its proper divisors (317627832).

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

199389768 is a wasteful number, since it uses less digits than its factorization.

199389768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322 (or 1318 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 60.

The square root of 199389768 is about 14120.5441821482. The cubic root of 199389768 is about 584.2081652983.

The spelling of 199389768 in words is "one hundred ninety-nine million, three hundred eighty-nine thousand, seven hundred sixty-eight".