198085005 has 24 divisors (see below), whose sum is σ = 343724472. Its totient is φ = 105529344.

The previous prime is 198084979. The next prime is 198085021. The reversal of 198085005 is 500580891.

It can be written as a sum of positive squares in 4 ways, for example, as 2812329 + 195272676 = 1677^2 + 13974^2 .

It is not a de Polignac number, because 198085005 - 2⁵ = 198084973 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52957 + ... + 56573.

It is an arithmetic number, because the mean of its divisors is an integer number (14321853).

Almost surely, 2^198085005 is an apocalyptic number.

198085005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198085005 is a deficient number, since it is larger than the sum of its proper divisors (145639467).

198085005 is a wasteful number, since it uses less digits than its factorization.

198085005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4845 (or 4842 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 198085005 is about 14074.2674764977. The cubic root of 198085005 is about 582.9310654254.

The spelling of 198085005 in words is "one hundred ninety-eight million, eighty-five thousand, five".