198781283 has 18 divisors (see below), whose sum is σ = 212311476. Its totient is φ = 186087664.

The previous prime is 198781273. The next prime is 198781307. The reversal of 198781283 is 382187891.

It is not a de Polignac number, because 198781283 - 2¹⁴ = 198764899 is a prime.

It is a super-2 number, since 2×198781283² = 79027996942252178, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198781273) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1857716 + ... + 1857822.

It is an arithmetic number, because the mean of its divisors is an integer number (11795082).

Almost surely, 2^198781283 is an apocalyptic number.

198781283 is a deficient number, since it is larger than the sum of its proper divisors (13530193).

198781283 is an equidigital number, since it uses as much as digits as its factorization.

198781283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 183 counting only the distinct ones).

The product of its digits is 193536, while the sum is 47.

The square root of 198781283 is about 14098.9816298909. The cubic root of 198781283 is about 583.6132766443.

The spelling of 198781283 in words is "one hundred ninety-eight million, seven hundred eighty-one thousand, two hundred eighty-three".