198424 has 16 divisors (see below), whose sum is σ = 394200. Its totient is φ = 93312.

The previous prime is 198413. The next prime is 198427. The reversal of 198424 is 424891.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 198392 and 198401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198427) by changing a digit.

198424 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 in 3 ways as a sum of consecutive naturals, for example, 594 + ... + 865.

2¹⁹⁸⁴²⁴ is an apocalyptic number.

It is an amenable number.

198424 is a deficient number, since it is larger than the sum of its proper divisors (195776).

198424 is a wasteful number, since it uses less digits than its factorization.

198424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482 (or 1478 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 198424 is about 445.4480890070. The cubic root of 198424 is about 58.3263411120.

The spelling of 198424 in words is "one hundred ninety-eight thousand, four hundred twenty-four".