198105648 has 80 divisors (see below), whose sum is σ = 558818400. Its totient is φ = 60106752.

The previous prime is 198105617. The next prime is 198105653. The reversal of 198105648 is 846501891.

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, 43378 + ... + 47726.

It is an arithmetic number, because the mean of its divisors is an integer number (6985230).

Almost surely, 2^198105648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198105648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279409200).

198105648 is an abundant number, since it is smaller than the sum of its proper divisors (360712752).

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

198105648 is a wasteful number, since it uses less digits than its factorization.

198105648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446 (or 4440 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 198105648 is about 14075.0008170515. Note that the first 3 decimals coincide. The cubic root of 198105648 is about 582.9513143551.

The spelling of 198105648 in words is "one hundred ninety-eight million, one hundred five thousand, six hundred forty-eight".