198742320 has 240 divisors, whose sum is σ = 779950080. Its totient is φ = 44407296.

The previous prime is 198742303. The next prime is 198742321. The reversal of 198742320 is 23247891.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (198742321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 236461 + ... + 237299.

It is an arithmetic number, because the mean of its divisors is an integer number (3249792).

Almost surely, 2^198742320 is an apocalyptic number.

198742320 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 198742320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389975040).

198742320 is an abundant number, since it is smaller than the sum of its proper divisors (581207760).

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

198742320 is a wasteful number, since it uses less digits than its factorization.

198742320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 198742320 is about 14097.5997957099. The cubic root of 198742320 is about 583.5751429232.

The spelling of 198742320 in words is "one hundred ninety-eight million, seven hundred forty-two thousand, three hundred twenty".