198190 has 8 divisors (see below), whose sum is σ = 356760. Its totient is φ = 79272.

The previous prime is 198179. The next prime is 198193. The reversal of 198190 is 91891.

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

It is a super-2 number, since 2×198190² = 78558552200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198193) by changing a digit.

198190 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, 9900 + ... + 9919.

It is an arithmetic number, because the mean of its divisors is an integer number (44595).

2¹⁹⁸¹⁹⁰ is an apocalyptic number.

198190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198190 is a deficient number, since it is larger than the sum of its proper divisors (158570).

198190 is a wasteful number, since it uses less digits than its factorization.

198190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19826.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 198190 is about 445.1853546558. The cubic root of 198190 is about 58.3034041479.

The spelling of 198190 in words is "one hundred ninety-eight thousand, one hundred ninety".