198208585 has 8 divisors (see below), whose sum is σ = 238094856. Its totient is φ = 158403840.

The previous prime is 198208529. The next prime is 198208597. The reversal of 198208585 is 585802891.

It can be written as a sum of positive squares in 4 ways, for example, as 14768649 + 183439936 = 3843^2 + 13544^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198208585 - 2²⁵ = 164654153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14896 + ... + 24865.

It is an arithmetic number, because the mean of its divisors is an integer number (29761857).

Almost surely, 2^198208585 is an apocalyptic number.

It is an amenable number.

198208585 is a deficient number, since it is larger than the sum of its proper divisors (39886271).

198208585 is an equidigital number, since it uses as much as digits as its factorization.

198208585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40763.

The product of its (nonzero) digits is 230400, while the sum is 46.

The square root of 198208585 is about 14078.6570737411. The cubic root of 198208585 is about 583.0522653201.

The spelling of 198208585 in words is "one hundred ninety-eight million, two hundred eight thousand, five hundred eighty-five".