198020305 has 16 divisors (see below), whose sum is σ = 273715200. Its totient is φ = 134713152.

The previous prime is 198020293. The next prime is 198020357. The reversal of 198020305 is 503020891.

It is not a de Polignac number, because 198020305 - 2⁹ = 198019793 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17830 + ... + 26719.

It is an arithmetic number, because the mean of its divisors is an integer number (17107200).

Almost surely, 2^198020305 is an apocalyptic number.

It is an amenable number.

198020305 is a deficient number, since it is larger than the sum of its proper divisors (75694895).

198020305 is a wasteful number, since it uses less digits than its factorization.

198020305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44688.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 198020305 is about 14071.9687677311. The cubic root of 198020305 is about 582.8675914184.

The spelling of 198020305 in words is "one hundred ninety-eight million, twenty thousand, three hundred five".