198290 has 16 divisors (see below), whose sum is σ = 362880. Its totient is φ = 78000.

The previous prime is 198281. The next prime is 198301. The reversal of 198290 is 92891.

198290 = 123² + 124² + ... + 134².

It is a Curzon number.

It is an unprimeable number.

198290 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 7 ways as a sum of consecutive naturals, for example, 665 + ... + 915.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2¹⁹⁸²⁹⁰ is an apocalyptic number.

198290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198290 is a deficient number, since it is larger than the sum of its proper divisors (164590).

198290 is a wasteful number, since it uses less digits than its factorization.

198290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 198290 is about 445.2976532613. The cubic root of 198290 is about 58.3132084773.

The spelling of 198290 in words is "one hundred ninety-eight thousand, two hundred ninety".