198590 has 16 divisors (see below), whose sum is σ = 408672. Its totient is φ = 68064.

The previous prime is 198589. The next prime is 198593. The reversal of 198590 is 95891.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1349 + ... + 1488.

It is an arithmetic number, because the mean of its divisors is an integer number (25542).

2¹⁹⁸⁵⁹⁰ is an apocalyptic number.

198590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198590 is an abundant number, since it is smaller than the sum of its proper divisors (210082).

It is a weird number, because it is abundant, but not a pseudoperfect number.

198590 is a wasteful number, since it uses less digits than its factorization.

198590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 198590 is about 445.6343792842. The cubic root of 198590 is about 58.3426017019.

The spelling of 198590 in words is "one hundred ninety-eight thousand, five hundred ninety".