198085518 has 24 divisors (see below), whose sum is σ = 429472368. Its totient is φ = 65984352.

The previous prime is 198085471. The next prime is 198085523. The reversal of 198085518 is 815580891.

198085518 is a `hidden beast` number, since 1 + 98 + 0 + 8 + 551 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34930 + ... + 40202.

It is an arithmetic number, because the mean of its divisors is an integer number (17894682).

Almost surely, 2^198085518 is an apocalyptic number.

198085518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

198085518 is an abundant number, since it is smaller than the sum of its proper divisors (231386850).

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

198085518 is a wasteful number, since it uses less digits than its factorization.

198085518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7368 (or 7365 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 45.

The square root of 198085518 is about 14074.2857012354. The cubic root of 198085518 is about 582.9315686494.

The spelling of 198085518 in words is "one hundred ninety-eight million, eighty-five thousand, five hundred eighteen".