198642 has 8 divisors (see below), whose sum is σ = 397296. Its totient is φ = 66212.

The previous prime is 198641. The next prime is 198647. The reversal of 198642 is 246891.

It is a sphenic number, since it is the product of 3 distinct primes.

198642 is an admirable number.

It is a d-powerful number, because it can be written as 1 + 9³ + 6⁴ + 8 + 4⁸ + 2¹⁷ .

It is not an unprimeable number, because it can be changed into a prime (198641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16548 + ... + 16559.

It is an arithmetic number, because the mean of its divisors is an integer number (49662).

2¹⁹⁸⁶⁴² is an apocalyptic number.

198642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

198642 is a wasteful number, since it uses less digits than its factorization.

198642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33112.

The product of its digits is 3456, while the sum is 30.

The square root of 198642 is about 445.6927192585. The cubic root of 198642 is about 58.3476935168.

The spelling of 198642 in words is "one hundred ninety-eight thousand, six hundred forty-two".