243987260 has 24 divisors (see below), whose sum is σ = 558953136. Its totient is φ = 88722560.

The previous prime is 243987259. The next prime is 243987283. The reversal of 243987260 is 62789342.

It is a happy number.

243987260 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554297 + ... + 554736.

It is an arithmetic number, because the mean of its divisors is an integer number (23289714).

Almost surely, 2^243987260 is an apocalyptic number.

243987260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243987260 is an abundant number, since it is smaller than the sum of its proper divisors (314965876).

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

243987260 is a wasteful number, since it uses less digits than its factorization.

243987260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109053 (or 1109051 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 243987260 is about 15620.0915490275. The cubic root of 243987260 is about 624.8691011200.

The spelling of 243987260 in words is "two hundred forty-three million, nine hundred eighty-seven thousand, two hundred sixty".