128198 has 8 divisors (see below), whose sum is σ = 219792. Its totient is φ = 54936.
The previous prime is 128189. The next prime is 128201. The reversal of 128198 is 891821.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a self number, because there is not a number n which added to its sum of digits gives 128198.
It is a congruent number.
It is an unprimeable number.
128198 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, 4565 + ... + 4592.
It is an arithmetic number, because the mean of its divisors is an integer number (27474).
2128198 is an apocalyptic number.
128198 is a deficient number, since it is larger than the sum of its proper divisors (91594).
128198 is an equidigital number, since it uses as much as digits as its factorization.
128198 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 9166.
The product of its digits is 1152, while the sum is 29.
The square root of 128198 is about 358.0474828846. The cubic root of 128198 is about 50.4228144800.
The spelling of 128198 in words is "one hundred twenty-eight thousand, one hundred ninety-eight".
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