198824985 has 24 divisors (see below), whose sum is σ = 350475840. Its totient is φ = 104241312.

The previous prime is 198824981. The next prime is 198825001. The reversal of 198824985 is 589428891.

It is not a de Polignac number, because 198824985 - 2² = 198824981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (198824981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34789 + ... + 40098.

It is an arithmetic number, because the mean of its divisors is an integer number (14603160).

Almost surely, 2^198824985 is an apocalyptic number.

198824985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198824985 is a deficient number, since it is larger than the sum of its proper divisors (151650855).

198824985 is a wasteful number, since it uses less digits than its factorization.

198824985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74957 (or 74954 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The square root of 198824985 is about 14100.5313729661. The cubic root of 198824985 is about 583.6560425730.

It can be divided in two parts, 198824 and 985, that added together give a square (199809 = 447²).

The spelling of 198824985 in words is "one hundred ninety-eight million, eight hundred twenty-four thousand, nine hundred eighty-five".