243909234 has 48 divisors (see below), whose sum is σ = 563231448. Its totient is φ = 76018176.

The previous prime is 243909229. The next prime is 243909269. The reversal of 243909234 is 432909342.

It can be written as a sum of positive squares in 4 ways, for example, as 243453609 + 455625 = 15603^2 + 675^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45504 + ... + 50580.

Almost surely, 2^243909234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243909234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281615724).

243909234 is an abundant number, since it is smaller than the sum of its proper divisors (319322214).

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

243909234 is a wasteful number, since it uses less digits than its factorization.

243909234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5259 (or 5256 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 243909234 is about 15617.5937327106. The cubic root of 243909234 is about 624.8024839331.

The spelling of 243909234 in words is "two hundred forty-three million, nine hundred nine thousand, two hundred thirty-four".