199899396 has 36 divisors (see below), whose sum is σ = 535026492. Its totient is φ = 62713344.

The previous prime is 199899383. The next prime is 199899421. The reversal of 199899396 is 693998991.

It can be written as a sum of positive squares in 2 ways, for example, as 158760000 + 41139396 = 12600^2 + 6414^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 162705 + ... + 163928.

It is an arithmetic number, because the mean of its divisors is an integer number (14861847).

Almost surely, 2^199899396 is an apocalyptic number.

It is an amenable number.

199899396 is an abundant number, since it is smaller than the sum of its proper divisors (335127096).

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

199899396 is a wasteful number, since it uses less digits than its factorization.

199899396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326660 (or 326655 counting only the distinct ones).

The product of its digits is 8503056, while the sum is 63.

The square root of 199899396 is about 14138.5782877912. The cubic root of 199899396 is about 584.7054752364.

The spelling of 199899396 in words is "one hundred ninety-nine million, eight hundred ninety-nine thousand, three hundred ninety-six".