198490 has 16 divisors (see below), whose sum is σ = 373248. Its totient is φ = 75856.

The previous prime is 198479. The next prime is 198491. The reversal of 198490 is 94891.

198490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (198491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202 + ... + 661.

It is an arithmetic number, because the mean of its divisors is an integer number (23328).

2¹⁹⁸⁴⁹⁰ is an apocalyptic number.

198490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198490 is a deficient number, since it is larger than the sum of its proper divisors (174758).

198490 is a wasteful number, since it uses less digits than its factorization.

198490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 198490 is about 445.5221655541. The cubic root of 198490 is about 58.3328072515.

It can be divided in two parts, 198 and 490, that multiplied together give a triangular number (97020 = T₄₄₀).

The spelling of 198490 in words is "one hundred ninety-eight thousand, four hundred ninety".