198988 has 6 divisors (see below), whose sum is σ = 348236. Its totient is φ = 99492.

The previous prime is 198977. The next prime is 198997. The reversal of 198988 is 889891.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 24870 + ... + 24877.

2¹⁹⁸⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

198988 is a deficient number, since it is larger than the sum of its proper divisors (149248).

198988 is a wasteful number, since it uses less digits than its factorization.

198988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49751 (or 49749 counting only the distinct ones).

The product of its digits is 41472, while the sum is 43.

The square root of 198988 is about 446.0807101859. The cubic root of 198988 is about 58.3815510624.

It can be divided in two parts, 1 and 98988, that added together give a palindrome (98989).

The spelling of 198988 in words is "one hundred ninety-eight thousand, nine hundred eighty-eight".