243120320 has 56 divisors (see below), whose sum is σ = 582930000. Its totient is φ = 96576512.

The previous prime is 243120307. The next prime is 243120329. The reversal of 243120320 is 23021342.

It is not an unprimeable number, because it can be changed into a prime (243120329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45131 + ... + 50229.

Almost surely, 2^243120320 is an apocalyptic number.

243120320 is a gapful number since it is divisible by the number (20) 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 243120320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291465000).

243120320 is an abundant number, since it is smaller than the sum of its proper divisors (339809680).

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

243120320 is a wasteful number, since it uses less digits than its factorization.

243120320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5265 (or 5255 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 243120320 is about 15592.3160563144. The cubic root of 243120320 is about 624.1281240306.

Adding to 243120320 its reverse (23021342), we get a palindrome (266141662).

The spelling of 243120320 in words is "two hundred forty-three million, one hundred twenty thousand, three hundred twenty".