198815320 has 64 divisors (see below), whose sum is σ = 493581600. Its totient is φ = 71470080.

The previous prime is 198815317. The next prime is 198815327. The reversal of 198815320 is 23518891.

It is a self number, because there is not a number n which added to its sum of digits gives 198815320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198815327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36622 + ... + 41698.

Almost surely, 2^198815320 is an apocalyptic number.

198815320 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 198815320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246790800).

198815320 is an abundant number, since it is smaller than the sum of its proper divisors (294766280).

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

198815320 is a wasteful number, since it uses less digits than its factorization.

198815320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188 (or 5184 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 198815320 is about 14100.1886512202. The cubic root of 198815320 is about 583.6465851314.

It can be divided in two parts, 198 and 815320, that added together give a palindrome (815518).

The spelling of 198815320 in words is "one hundred ninety-eight million, eight hundred fifteen thousand, three hundred twenty".