198238 has 4 divisors (see below), whose sum is σ = 297360. Its totient is φ = 99118.

The previous prime is 198223. The next prime is 198241. The reversal of 198238 is 832891.

198238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 832891 = 307 ⋅2713.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

198238 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 as a sum of consecutive naturals, namely, 49558 + ... + 49561.

It is an arithmetic number, because the mean of its divisors is an integer number (74340).

2¹⁹⁸²³⁸ is an apocalyptic number.

198238 is a deficient number, since it is larger than the sum of its proper divisors (99122).

198238 is an equidigital number, since it uses as much as digits as its factorization.

198238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99121.

The product of its digits is 3456, while the sum is 31.

The square root of 198238 is about 445.2392615213. The cubic root of 198238 is about 58.3081106375.

The spelling of 198238 in words is "one hundred ninety-eight thousand, two hundred thirty-eight".