243938 has 8 divisors (see below), whose sum is σ = 381888. Its totient is φ = 116644.

The previous prime is 243931. The next prime is 243953. The reversal of 243938 is 839342.

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

It is a self number, because there is not a number n which added to its sum of digits gives 243938.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243938.

It is not an unprimeable number, because it can be changed into a prime (243931) by changing a digit.

243938 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2606 + ... + 2697.

It is an arithmetic number, because the mean of its divisors is an integer number (47736).

2²⁴³⁹³⁸ is an apocalyptic number.

243938 is a deficient number, since it is larger than the sum of its proper divisors (137950).

243938 is a wasteful number, since it uses less digits than its factorization.

243938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328.

The product of its digits is 5184, while the sum is 29.

The square root of 243938 is about 493.9007997564. The cubic root of 243938 is about 62.4827045477.

The spelling of 243938 in words is "two hundred forty-three thousand, nine hundred thirty-eight".