243921768 has 32 divisors (see below), whose sum is σ = 612022560. Its totient is φ = 81011520.

The previous prime is 243921761. The next prime is 243921773. The reversal of 243921768 is 867129342.

It is not an unprimeable number, because it can be changed into a prime (243921761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11698 + ... + 24993.

It is an arithmetic number, because the mean of its divisors is an integer number (19125705).

Almost surely, 2^243921768 is an apocalyptic number.

It is an amenable number.

243921768 is an abundant number, since it is smaller than the sum of its proper divisors (368100792).

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

243921768 is a wasteful number, since it uses less digits than its factorization.

243921768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36977 (or 36973 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 243921768 is about 15617.9950057618. The cubic root of 243921768 is about 624.8131861932.

The spelling of 243921768 in words is "two hundred forty-three million, nine hundred twenty-one thousand, seven hundred sixty-eight".