198398 has 16 divisors (see below), whose sum is σ = 328320. Its totient is φ = 89496.

The previous prime is 198397. The next prime is 198409. The reversal of 198398 is 893891.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 198398.

It is not an unprimeable number, because it can be changed into a prime (198391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761 + ... + 987.

It is an arithmetic number, because the mean of its divisors is an integer number (20520).

2¹⁹⁸³⁹⁸ is an apocalyptic number.

198398 is a deficient number, since it is larger than the sum of its proper divisors (129922).

198398 is a wasteful number, since it uses less digits than its factorization.

198398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271.

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

The square root of 198398 is about 445.4189039545. The cubic root of 198398 is about 58.3237934513.

The spelling of 198398 in words is "one hundred ninety-eight thousand, three hundred ninety-eight".