199830 has 16 divisors (see below), whose sum is σ = 479664. Its totient is φ = 53280.

The previous prime is 199819. The next prime is 199831. The reversal of 199830 is 38991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 6661 = 199830 / (1 + 9 + 9 + 8 + 3 + 0).

It is a congruent number.

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

199830 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 7 ways as a sum of consecutive naturals, for example, 3301 + ... + 3360.

It is an arithmetic number, because the mean of its divisors is an integer number (29979).

2¹⁹⁹⁸³⁰ is an apocalyptic number.

199830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199830 is an abundant number, since it is smaller than the sum of its proper divisors (279834).

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

199830 is a wasteful number, since it uses less digits than its factorization.

199830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 199830 is about 447.0234893157. The cubic root of 199830 is about 58.4637806335.

The spelling of 199830 in words is "one hundred ninety-nine thousand, eight hundred thirty".