243836 has 12 divisors (see below), whose sum is σ = 436128. Its totient is φ = 119232.

The previous prime is 243829. The next prime is 243839. The reversal of 243836 is 638342.

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 243836.

It is not an unprimeable number, because it can be changed into a prime (243839) by changing a digit.

243836 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, 461 + ... + 836.

It is an arithmetic number, because the mean of its divisors is an integer number (36344).

2²⁴³⁸³⁶ is an apocalyptic number.

It is an amenable number.

243836 is a deficient number, since it is larger than the sum of its proper divisors (192292).

243836 is a wasteful number, since it uses less digits than its factorization.

243836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348 (or 1346 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 243836 is about 493.7975293579. The cubic root of 243836 is about 62.4739945143.

It can be divided in two parts, 24383 and 6, that added together give a cube (24389 = 29³).

The spelling of 243836 in words is "two hundred forty-three thousand, eight hundred thirty-six".