198797280 has 192 divisors, whose sum is σ = 713276928. Its totient is φ = 46069760.

The previous prime is 198797273. The next prime is 198797281. The reversal of 198797280 is 82797891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198797281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120622 + ... + 122258.

It is an arithmetic number, because the mean of its divisors is an integer number (3714984).

Almost surely, 2^198797280 is an apocalyptic number.

198797280 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 198797280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356638464).

198797280 is an abundant number, since it is smaller than the sum of its proper divisors (514479648).

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

198797280 is a wasteful number, since it uses less digits than its factorization.

198797280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1681 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 51.

The square root of 198797280 is about 14099.5489289551. The cubic root of 198797280 is about 583.6289317251.

The spelling of 198797280 in words is "one hundred ninety-eight million, seven hundred ninety-seven thousand, two hundred eighty".