198718 has 8 divisors (see below), whose sum is σ = 321048. Its totient is φ = 91704.

The previous prime is 198701. The next prime is 198719. The reversal of 198718 is 817891.

198718 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198719) by changing a digit.

198718 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 in 3 ways as a sum of consecutive naturals, for example, 3796 + ... + 3847.

It is an arithmetic number, because the mean of its divisors is an integer number (40131).

2¹⁹⁸⁷¹⁸ is an apocalyptic number.

198718 is a deficient number, since it is larger than the sum of its proper divisors (122330).

198718 is a wasteful number, since it uses less digits than its factorization.

198718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7658.

The product of its digits is 4032, while the sum is 34.

The square root of 198718 is about 445.7779716406. Note that the first 3 decimals coincide. The cubic root of 198718 is about 58.3551338018.

The spelling of 198718 in words is "one hundred ninety-eight thousand, seven hundred eighteen".