198550 has 36 divisors (see below), whose sum is σ = 425196. Its totient is φ = 68400.

The previous prime is 198533. The next prime is 198553. The reversal of 198550 is 55891.

198550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198553) by changing a digit.

198550 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 17 ways as a sum of consecutive naturals, for example, 10441 + ... + 10459.

It is an arithmetic number, because the mean of its divisors is an integer number (11811).

2¹⁹⁸⁵⁵⁰ is an apocalyptic number.

198550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198550 is an abundant number, since it is smaller than the sum of its proper divisors (226646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198550 is a wasteful number, since it uses less digits than its factorization.

198550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 198550 is about 445.5894971832. The cubic root of 198550 is about 58.3386843164.

It can be divided in two parts, 198 and 550, that multiplied together give a square (108900 = 330²).

The spelling of 198550 in words is "one hundred ninety-eight thousand, five hundred fifty".