243845538 has 8 divisors (see below), whose sum is σ = 487691088. Its totient is φ = 81281844.

The previous prime is 243845531. The next prime is 243845557. The reversal of 243845538 is 835548342.

It is a sphenic number, since it is the product of 3 distinct primes.

243845538 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 243845538.

It is not an unprimeable number, because it can be changed into a prime (243845531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20320456 + ... + 20320467.

It is an arithmetic number, because the mean of its divisors is an integer number (60961386).

Almost surely, 2^243845538 is an apocalyptic number.

243845538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

243845538 is a wasteful number, since it uses less digits than its factorization.

243845538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40640928.

The product of its digits is 460800, while the sum is 42.

The square root of 243845538 is about 15615.5543609569. The cubic root of 243845538 is about 624.7480909072.

The spelling of 243845538 in words is "two hundred forty-three million, eight hundred forty-five thousand, five hundred thirty-eight".