243636 has 24 divisors (see below), whose sum is σ = 577920. Its totient is φ = 79872.

The previous prime is 243631. The next prime is 243643. The reversal of 243636 is 636342.

It is a nude number because it is divisible by every one of its digits.

It is a d-powerful number, because it can be written as 2 + 4⁸ + 6 + 3⁶ + 3¹¹ + 6³ .

243636 is a modest number, since divided by 3636 gives 24 as remainder.

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 243636.

It is not an unprimeable number, because it can be changed into a prime (243631) by changing a digit.

243636 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 7 ways as a sum of consecutive naturals, for example, 820 + ... + 1076.

It is an arithmetic number, because the mean of its divisors is an integer number (24080).

2²⁴³⁶³⁶ is an apocalyptic number.

It is an amenable number.

243636 is an abundant number, since it is smaller than the sum of its proper divisors (334284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243636 is a wasteful number, since it uses less digits than its factorization.

243636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 341 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

The square root of 243636 is about 493.5949756632. The cubic root of 243636 is about 62.4569089641.

Adding to 243636 its reverse (636342), we get a palindrome (879978).

The spelling of 243636 in words is "two hundred forty-three thousand, six hundred thirty-six".