198026 has 4 divisors (see below), whose sum is σ = 297042. Its totient is φ = 99012.

The previous prime is 198017. The next prime is 198031. The reversal of 198026 is 620891.

198026 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 445²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 620891 = 17 ⋅36523.

It can be written as a sum of positive squares in only one way, i.e., 198025 + 1 = 445^2 + 1^2 .

It is a junction number, because it is equal to n+sod(n) for n = 197986 and 198004.

It is an unprimeable number.

198026 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 49505 + ... + 49508.

2¹⁹⁸⁰²⁶ is an apocalyptic number.

198026 is a deficient number, since it is larger than the sum of its proper divisors (99016).

198026 is an equidigital number, since it uses as much as digits as its factorization.

198026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99015.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 198026 is about 445.0011235941. The cubic root of 198026 is about 58.2873179059.

The spelling of 198026 in words is "one hundred ninety-eight thousand, twenty-six".