198040 has 16 divisors (see below), whose sum is σ = 445680. Its totient is φ = 79200.

The previous prime is 198031. The next prime is 198043. The reversal of 198040 is 40891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198043) by changing a digit.

198040 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, 2436 + ... + 2515.

It is an arithmetic number, because the mean of its divisors is an integer number (27855).

2¹⁹⁸⁰⁴⁰ is an apocalyptic number.

198040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198040 is an abundant number, since it is smaller than the sum of its proper divisors (247640).

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

198040 is a wasteful number, since it uses less digits than its factorization.

198040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4962 (or 4958 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 198040 is about 445.0168536134. The cubic root of 198040 is about 58.2886914684.

The spelling of 198040 in words is "one hundred ninety-eight thousand, forty".