198445 has 16 divisors (see below), whose sum is σ = 266112. Its totient is φ = 141120.

The previous prime is 198439. The next prime is 198461. The reversal of 198445 is 544891.

It is a happy number.

198445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198445 - 2³ = 198437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2760 + ... + 2830.

It is an arithmetic number, because the mean of its divisors is an integer number (16632).

2¹⁹⁸⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

198445 is a deficient number, since it is larger than the sum of its proper divisors (67667).

198445 is a wasteful number, since it uses less digits than its factorization.

198445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132.

The product of its digits is 5760, while the sum is 31.

The square root of 198445 is about 445.4716601536. The cubic root of 198445 is about 58.3283986755.

It can be divided in two parts, 19 and 8445, that added together give a square (8464 = 92²).

The spelling of 198445 in words is "one hundred ninety-eight thousand, four hundred forty-five".