243916866 has 32 divisors (see below), whose sum is σ = 559526400. Its totient is φ = 78682320.

The previous prime is 243916861. The next prime is 243916873. The reversal of 243916866 is 668619342.

It is not an unprimeable number, because it can be changed into a prime (243916861) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 71181 + ... + 74528.

It is an arithmetic number, because the mean of its divisors is an integer number (17485200).

Almost surely, 2^243916866 is an apocalyptic number.

243916866 is an abundant number, since it is smaller than the sum of its proper divisors (315609534).

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

243916866 is a wasteful number, since it uses less digits than its factorization.

243916866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145751 (or 145745 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 243916866 is about 15617.8380706166. The cubic root of 243916866 is about 624.8090006234.

The spelling of 243916866 in words is "two hundred forty-three million, nine hundred sixteen thousand, eight hundred sixty-six".