243904316 has 12 divisors (see below), whose sum is σ = 427373688. Its totient is φ = 121797552.

The previous prime is 243904307. The next prime is 243904319. The reversal of 243904316 is 613409342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243904319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35066 + ... + 41441.

It is an arithmetic number, because the mean of its divisors is an integer number (35614474).

Almost surely, 2^243904316 is an apocalyptic number.

It is an amenable number.

243904316 is a deficient number, since it is larger than the sum of its proper divisors (183469372).

243904316 is a wasteful number, since it uses less digits than its factorization.

243904316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77308 (or 77306 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 243904316 is about 15617.4362812851. The cubic root of 243904316 is about 624.7982845577.

The spelling of 243904316 in words is "two hundred forty-three million, nine hundred four thousand, three hundred sixteen".