199838 has 8 divisors (see below), whose sum is σ = 302088. Its totient is φ = 99144.

The previous prime is 199831. The next prime is 199853. The reversal of 199838 is 838991.

199838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199831) by changing a digit.

199838 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 632.

It is an arithmetic number, because the mean of its divisors is an integer number (37761).

2¹⁹⁹⁸³⁸ is an apocalyptic number.

199838 is a deficient number, since it is larger than the sum of its proper divisors (102250).

199838 is a wasteful number, since it uses less digits than its factorization.

199838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778.

The product of its digits is 15552, while the sum is 38.

The square root of 199838 is about 447.0324373018. The cubic root of 199838 is about 58.4645608033.

It can be divided in two parts, 19983 and 8, that added together give a palindrome (19991).

The spelling of 199838 in words is "one hundred ninety-nine thousand, eight hundred thirty-eight".