243761568 has 48 divisors (see below), whose sum is σ = 650734560. Its totient is φ = 79874816.

The previous prime is 243761563. The next prime is 243761579. The reversal of 243761568 is 865167342.

It is a tau number, because it is divible by the number of its divisors (48).

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (243761561) 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 7 ways as a sum of consecutive naturals, for example, 15855 + ... + 27182.

It is an arithmetic number, because the mean of its divisors is an integer number (13556970).

Almost surely, 2^243761568 is an apocalyptic number.

It is an amenable number.

243761568 is an abundant number, since it is smaller than the sum of its proper divisors (406972992).

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

243761568 is a wasteful number, since it uses less digits than its factorization.

243761568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43109 (or 43101 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 243761568 is about 15612.8654640972. The cubic root of 243761568 is about 624.6763704779.

The spelling of 243761568 in words is "two hundred forty-three million, seven hundred sixty-one thousand, five hundred sixty-eight".