243688 has 16 divisors (see below), whose sum is σ = 463680. Its totient is φ = 120048.

The previous prime is 243673. The next prime is 243701. The reversal of 243688 is 886342.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243688.

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, 481 + ... + 847.

It is an arithmetic number, because the mean of its divisors is an integer number (28980).

2²⁴³⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

243688 is a deficient number, since it is larger than the sum of its proper divisors (219992).

243688 is a wasteful number, since it uses less digits than its factorization.

243688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 452 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 243688 is about 493.6476476192. The cubic root of 243688 is about 62.4613521064.

The spelling of 243688 in words is "two hundred forty-three thousand, six hundred eighty-eight".