198081800 has 96 divisors (see below), whose sum is σ = 530382720. Its totient is φ = 67392000.

The previous prime is 198081781. The next prime is 198081833. The reversal of 198081800 is 8180891.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210932 + ... + 211868.

It is an arithmetic number, because the mean of its divisors is an integer number (5524820).

Almost surely, 2^198081800 is an apocalyptic number.

198081800 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 198081800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265191360).

198081800 is an abundant number, since it is smaller than the sum of its proper divisors (332300920).

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

198081800 is a wasteful number, since it uses less digits than its factorization.

198081800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 198081800 is about 14074.1536157596. The cubic root of 198081800 is about 582.9279214820.

The spelling of 198081800 in words is "one hundred ninety-eight million, eighty-one thousand, eight hundred".