198085090 has 32 divisors (see below), whose sum is σ = 416972160. Its totient is φ = 66334464.

The previous prime is 198085081. The next prime is 198085091. The reversal of 198085090 is 90580891.

It is not an unprimeable number, because it can be changed into a prime (198085091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29895 + ... + 35914.

It is an arithmetic number, because the mean of its divisors is an integer number (13030380).

Almost surely, 2^198085090 is an apocalyptic number.

198085090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198085090 is an abundant number, since it is smaller than the sum of its proper divisors (218887070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198085090 is a wasteful number, since it uses less digits than its factorization.

198085090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65866.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 198085090 is about 14074.2704961927. The cubic root of 198085090 is about 582.9311488057.

The spelling of 198085090 in words is "one hundred ninety-eight million, eighty-five thousand, ninety".