243904338 has 64 divisors (see below), whose sum is σ = 586206720. Its totient is φ = 74877696.

The previous prime is 243904337. The next prime is 243904361. The reversal of 243904338 is 833409342.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (243904337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40320 + ... + 45972.

It is an arithmetic number, because the mean of its divisors is an integer number (9159480).

Almost surely, 2^243904338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243904338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293103360).

243904338 is an abundant number, since it is smaller than the sum of its proper divisors (342302382).

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

243904338 is a wasteful number, since it uses less digits than its factorization.

243904338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728 (or 5722 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 243904338 is about 15617.4369856260. The cubic root of 243904338 is about 624.7983033432.

The spelling of 243904338 in words is "two hundred forty-three million, nine hundred four thousand, three hundred thirty-eight".