198556 has 6 divisors (see below), whose sum is σ = 347480. Its totient is φ = 99276.

The previous prime is 198553. The next prime is 198571. The reversal of 198556 is 655891.

198556 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 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24816 + ... + 24823.

2¹⁹⁸⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

198556 is a deficient number, since it is larger than the sum of its proper divisors (148924).

198556 is a wasteful number, since it uses less digits than its factorization.

198556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49643 (or 49641 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The square root of 198556 is about 445.5962297866. The cubic root of 198556 is about 58.3392719578.

The spelling of 198556 in words is "one hundred ninety-eight thousand, five hundred fifty-six".