198506 has 16 divisors (see below), whose sum is σ = 371520. Its totient is φ = 77280.

The previous prime is 198503. The next prime is 198529. The reversal of 198506 is 605891.

198506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 198506.

It is not an unprimeable number, because it can be changed into a prime (198503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491 + ... + 798.

It is an arithmetic number, because the mean of its divisors is an integer number (23220).

2¹⁹⁸⁵⁰⁶ is an apocalyptic number.

198506 is a deficient number, since it is larger than the sum of its proper divisors (173014).

198506 is a wasteful number, since it uses less digits than its factorization.

198506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 198506 is about 445.5401216501. The cubic root of 198506 is about 58.3343745846.

The spelling of 198506 in words is "one hundred ninety-eight thousand, five hundred six".