243446 has 8 divisors (see below), whose sum is σ = 417360. Its totient is φ = 104328.

The previous prime is 243437. The next prime is 243461. The reversal of 243446 is 644342.

It is a happy number.

243446 is nontrivially palindromic in base 13.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

243446 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8681 + ... + 8708.

It is an arithmetic number, because the mean of its divisors is an integer number (52170).

2²⁴³⁴⁴⁶ is an apocalyptic number.

243446 is a deficient number, since it is larger than the sum of its proper divisors (173914).

243446 is a wasteful number, since it uses less digits than its factorization.

243446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17398.

The product of its digits is 2304, while the sum is 23.

The square root of 243446 is about 493.4024726326. The cubic root of 243446 is about 62.4406690285.

Subtracting from 243446 its product of digits (2304), we obtain a palindrome (241142).

Adding to 243446 its reverse (644342), we get a palindrome (887788).

The spelling of 243446 in words is "two hundred forty-three thousand, four hundred forty-six".