198530 has 8 divisors (see below), whose sum is σ = 357372. Its totient is φ = 79408.

The previous prime is 198529. The next prime is 198533. The reversal of 198530 is 35891.

It can be written as a sum of positive squares in 2 ways, for example, as 185761 + 12769 = 431^2 + 113^2 .

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

It is a zygodrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 198530.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 198530.

It is not an unprimeable number, because it can be changed into a prime (198533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9917 + ... + 9936.

2¹⁹⁸⁵³⁰ is an apocalyptic number.

198530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198530 is a deficient number, since it is larger than the sum of its proper divisors (158842).

198530 is a wasteful number, since it uses less digits than its factorization.

198530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19860.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 198530 is about 445.5670544374. The cubic root of 198530 is about 58.3367254263.

The spelling of 198530 in words is "one hundred ninety-eight thousand, five hundred thirty".