243320832 has 144 divisors (see below), whose sum is σ = 721440720. Its totient is φ = 78962688.

The previous prime is 243320771. The next prime is 243320849. The reversal of 243320832 is 238023342.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 243320796 and 243320805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 792423 + ... + 792729.

It is an arithmetic number, because the mean of its divisors is an integer number (5010005).

Almost surely, 2^243320832 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 243320832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360720360).

243320832 is an abundant number, since it is smaller than the sum of its proper divisors (478119888).

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

243320832 is a wasteful number, since it uses less digits than its factorization.

243320832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 243320832 is about 15598.7445648680. The cubic root of 243320832 is about 624.2996588354.

The spelling of 243320832 in words is "two hundred forty-three million, three hundred twenty thousand, eight hundred thirty-two".