243788864 has 42 divisors (see below), whose sum is σ = 531762462. Its totient is φ = 110809600.

The previous prime is 243788863. The next prime is 243788899. The reversal of 243788864 is 468887342.

It can be written as a sum of positive squares in only one way, i.e., 151782400 + 92006464 = 12320^2 + 9592^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243788863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7997 + ... + 23484.

It is an arithmetic number, because the mean of its divisors is an integer number (12661011).

Almost surely, 2^243788864 is an apocalyptic number.

It is an amenable number.

243788864 is an abundant number, since it is smaller than the sum of its proper divisors (287973598).

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

243788864 is a wasteful number, since it uses less digits than its factorization.

243788864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31515 (or 31494 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 50.

The square root of 243788864 is about 15613.7395905017. The cubic root of 243788864 is about 624.6996863352.

The spelling of 243788864 in words is "two hundred forty-three million, seven hundred eighty-eight thousand, eight hundred sixty-four".