243844 has 6 divisors (see below), whose sum is σ = 426734. Its totient is φ = 121920.

The previous prime is 243839. The next prime is 243851. The reversal of 243844 is 448342.

It can be written as a sum of positive squares in only one way, i.e., 129600 + 114244 = 360^2 + 338^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30477 + ... + 30484.

2²⁴³⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

243844 is a deficient number, since it is larger than the sum of its proper divisors (182890).

243844 is a wasteful number, since it uses less digits than its factorization.

243844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60965 (or 60963 counting only the distinct ones).

The product of its digits is 3072, while the sum is 25.

The square root of 243844 is about 493.8056297775. The cubic root of 243844 is about 62.4746777419.

The spelling of 243844 in words is "two hundred forty-three thousand, eight hundred forty-four".