243785838 has 16 divisors (see below), whose sum is σ = 488033280. Its totient is φ = 81185016.

The previous prime is 243785837. The next prime is 243785873. The reversal of 243785838 is 838587342.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243785833) 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, 12168 + ... + 25211.

It is an arithmetic number, because the mean of its divisors is an integer number (30502080).

Almost surely, 2^243785838 is an apocalyptic number.

243785838 is an abundant number, since it is smaller than the sum of its proper divisors (244247442).

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

243785838 is a wasteful number, since it uses less digits than its factorization.

243785838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38471.

The product of its digits is 1290240, while the sum is 48.

The square root of 243785838 is about 15613.6426883671. The cubic root of 243785838 is about 624.6971016545.

The spelling of 243785838 in words is "two hundred forty-three million, seven hundred eighty-five thousand, eight hundred thirty-eight".