243116280 has 288 divisors, whose sum is σ = 904934160. Its totient is φ = 56125440.

The previous prime is 243116273. The next prime is 243116317. The reversal of 243116280 is 82611342.

243116280 is a `hidden beast` number, since 2 + 4 + 31 + 1 + 628 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3330324 + ... + 3330396.

Almost surely, 2^243116280 is an apocalyptic number.

243116280 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 243116280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452467080).

243116280 is an abundant number, since it is smaller than the sum of its proper divisors (661817880).

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

243116280 is a wasteful number, since it uses less digits than its factorization.

243116280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 243116280 is about 15592.1865047850. The cubic root of 243116280 is about 624.1246669061.

The spelling of 243116280 in words is "two hundred forty-three million, one hundred sixteen thousand, two hundred eighty".