243685872 has 60 divisors (see below), whose sum is σ = 683133360. Its totient is φ = 81091584.

The previous prime is 243685861. The next prime is 243685903. The reversal of 243685872 is 278586342.

243685872 is a `hidden beast` number, since 2 + 4 + 3 + 68 + 587 + 2 = 666.

243685872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119808 + ... + 121824.

It is an arithmetic number, because the mean of its divisors is an integer number (11385556).

Almost surely, 2^243685872 is an apocalyptic number.

It is an amenable number.

243685872 is an abundant number, since it is smaller than the sum of its proper divisors (439447488).

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

243685872 is a wasteful number, since it uses less digits than its factorization.

243685872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870 (or 2861 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 243685872 is about 15610.4411212496. The cubic root of 243685872 is about 624.6117029172.

The spelling of 243685872 in words is "two hundred forty-three million, six hundred eighty-five thousand, eight hundred seventy-two".