243816 has 16 divisors (see below), whose sum is σ = 609600.
Its totient is φ = 81264.
The previous prime is 243809. The next prime is 243829. The reversal of 243816 is 618342.
It is a happy number.
243816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 10159 = 243816 / (2 + 4 + 3 + 8 + 1 + 6).
It is a nude number because it is divisible by every one of its digits.
It is one of the 548 Lynch-Bell numbers.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5056 + ... + 5103.
It is an arithmetic number, because the mean of its divisors is an integer number (38100).
2243816 is an apocalyptic number.
It is an amenable number.
243816 is an abundant number, since it is smaller than the sum of its proper divisors (365784).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
243816 is a wasteful number, since it uses less digits than its factorization.
243816 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10168 (or 10164 counting only the distinct ones).
The product of its digits is 1152, while the sum is 24.
The square root of 243816 is about 493.7772777275.
Note that the first 3 decimals coincide.
The cubic root of 243816 is about 62.4722863798.
The spelling of 243816 in words is "two hundred forty-three thousand, eight hundred sixteen".