243686866 has 8 divisors (see below), whose sum is σ = 365603760. Its totient is φ = 121818948.

The previous prime is 243686813. The next prime is 243686881. The reversal of 243686866 is 668686342.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 5125 + ... + 22663.

It is an arithmetic number, because the mean of its divisors is an integer number (45700470).

Almost surely, 2^243686866 is an apocalyptic number.

243686866 is a deficient number, since it is larger than the sum of its proper divisors (121916894).

243686866 is a wasteful number, since it uses less digits than its factorization.

243686866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24488.

The product of its digits is 1990656, while the sum is 49.

The square root of 243686866 is about 15610.4729588824. The cubic root of 243686866 is about 624.6125521843.

The spelling of 243686866 in words is "two hundred forty-three million, six hundred eighty-six thousand, eight hundred sixty-six".