198340281 has 12 divisors (see below), whose sum is σ = 286977600. Its totient is φ = 132002520.

The previous prime is 198340277. The next prime is 198340283. The reversal of 198340281 is 182043891.

It is not a de Polignac number, because 198340281 - 2² = 198340277 is a prime.

It is a super-2 number, since 2×198340281² = 78677734134317922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (198340283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13005 + ... + 23786.

It is an arithmetic number, because the mean of its divisors is an integer number (23914800).

Almost surely, 2^198340281 is an apocalyptic number.

It is an amenable number.

198340281 is a deficient number, since it is larger than the sum of its proper divisors (88637319).

198340281 is a wasteful number, since it uses less digits than its factorization.

198340281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37396 (or 37393 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 198340281 is about 14083.3334477318. Note that the first 3 decimals coincide. The cubic root of 198340281 is about 583.1813694676.

The spelling of 198340281 in words is "one hundred ninety-eight million, three hundred forty thousand, two hundred eighty-one".