198568 has 8 divisors (see below), whose sum is σ = 372330. Its totient is φ = 99280.

The previous prime is 198553. The next prime is 198571. The reversal of 198568 is 865891.

198568 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in only one way, i.e., 191844 + 6724 = 438^2 + 82^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

198568 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, 12403 + ... + 12418.

2¹⁹⁸⁵⁶⁸ is an apocalyptic number.

It is an amenable number.

198568 is a deficient number, since it is larger than the sum of its proper divisors (173762).

198568 is a wasteful number, since it uses less digits than its factorization.

198568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24827 (or 24823 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 198568 is about 445.6096946881. The cubic root of 198568 is about 58.3404472050.

The spelling of 198568 in words is "one hundred ninety-eight thousand, five hundred sixty-eight".