243839616 has 96 divisors (see below), whose sum is σ = 683971200. Its totient is φ = 76958208.

The previous prime is 243839611. The next prime is 243839633. The reversal of 243839616 is 616938342.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (243839611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137745 + ... + 139503.

It is an arithmetic number, because the mean of its divisors is an integer number (7124700).

Almost surely, 2^243839616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243839616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341985600).

243839616 is an abundant number, since it is smaller than the sum of its proper divisors (440131584).

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

243839616 is a wasteful number, since it uses less digits than its factorization.

243839616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814 (or 1783 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 243839616 is about 15615.3647411772. The cubic root of 243839616 is about 624.7430333502.

The spelling of 243839616 in words is "two hundred forty-three million, eight hundred thirty-nine thousand, six hundred sixteen".