198885603840 has 1280 divisors, whose sum is σ = 862847631360. Its totient is φ = 37822464000.

The previous prime is 198885603781. The next prime is 198885603853. The reversal of 198885603840 is 48306588891.

It is a tau number, because it is divible by the number of its divisors (1280).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 348310755 + ... + 348311325.

It is an arithmetic number, because the mean of its divisors is an integer number (674099712).

Almost surely, 2^198885603840 is an apocalyptic number.

198885603840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198885603840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (431423815680).

198885603840 is an abundant number, since it is smaller than the sum of its proper divisors (663962027520).

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

198885603840 is a wasteful number, since it uses less digits than its factorization.

198885603840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 60.

The spelling of 198885603840 in words is "one hundred ninety-eight billion, eight hundred eighty-five million, six hundred three thousand, eight hundred forty".