243923688 has 48 divisors (see below), whose sum is σ = 666708900. Its totient is φ = 80559360.

The previous prime is 243923657. The next prime is 243923699. The reversal of 243923688 is 886329342.

It can be written as a sum of positive squares in 2 ways, for example, as 243921924 + 1764 = 15618^2 + 42^2 .

It is a nude number because it is divisible by every one of its digits.

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, 7693 + ... + 23388.

Almost surely, 2^243923688 is an apocalyptic number.

It is an amenable number.

243923688 is an abundant number, since it is smaller than the sum of its proper divisors (422785212).

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

243923688 is a wasteful number, since it uses less digits than its factorization.

243923688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31202 (or 31195 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 243923688 is about 15618.0564731979. The cubic root of 243923688 is about 624.8148255688.

The spelling of 243923688 in words is "two hundred forty-three million, nine hundred twenty-three thousand, six hundred eighty-eight".