199949568 has 144 divisors (see below), whose sum is σ = 655191936. Its totient is φ = 52715520.

The previous prime is 199949539. The next prime is 199949569. The reversal of 199949568 is 865949991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199949569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68458 + ... + 71318.

It is an arithmetic number, because the mean of its divisors is an integer number (4549944).

Almost surely, 2^199949568 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 199949568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327595968).

199949568 is an abundant number, since it is smaller than the sum of its proper divisors (455242368).

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

199949568 is a wasteful number, since it uses less digits than its factorization.

199949568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900 (or 2886 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 60.

The square root of 199949568 is about 14140.3524708545. The cubic root of 199949568 is about 584.7543888229.

The spelling of 199949568 in words is "one hundred ninety-nine million, nine hundred forty-nine thousand, five hundred sixty-eight".