198508 has 6 divisors (see below), whose sum is σ = 347396. Its totient is φ = 99252.

The previous prime is 198503. The next prime is 198529. The reversal of 198508 is 805891.

198508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 198508.

It is not an unprimeable number, because it can be changed into a prime (198503) by changing a digit.

198508 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, 24810 + ... + 24817.

2¹⁹⁸⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

198508 is a deficient number, since it is larger than the sum of its proper divisors (148888).

198508 is a wasteful number, since it uses less digits than its factorization.

198508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49631 (or 49629 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 198508 is about 445.5423661112. The cubic root of 198508 is about 58.3345704953.

The spelling of 198508 in words is "one hundred ninety-eight thousand, five hundred eight".