243822 has 8 divisors (see below), whose sum is σ = 487656. Its totient is φ = 81272.

The previous prime is 243809. The next prime is 243829. The reversal of 243822 is 228342.

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

243822 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243822.

It is not an unprimeable number, because it can be changed into a prime (243829) by changing a digit.

243822 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20313 + ... + 20324.

It is an arithmetic number, because the mean of its divisors is an integer number (60957).

2²⁴³⁸²² is an apocalyptic number.

243822 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.

243822 is a wasteful number, since it uses less digits than its factorization.

243822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40642.

The product of its digits is 768, while the sum is 21.

The square root of 243822 is about 493.7833533039. The cubic root of 243822 is about 62.4727988299.

The spelling of 243822 in words is "two hundred forty-three thousand, eight hundred twenty-two".