243308320 has 48 divisors (see below), whose sum is σ = 577620288. Its totient is φ = 96848640.

The previous prime is 243308311. The next prime is 243308341. The reversal of 243308320 is 23803342.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30157 + ... + 37363.

It is an arithmetic number, because the mean of its divisors is an integer number (12033756).

Almost surely, 2^243308320 is an apocalyptic number.

243308320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243308320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288810144).

243308320 is an abundant number, since it is smaller than the sum of its proper divisors (334311968).

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

243308320 is a wasteful number, since it uses less digits than its factorization.

243308320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7433 (or 7425 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 243308320 is about 15598.3435017953. The cubic root of 243308320 is about 624.2889577771.

The spelling of 243308320 in words is "two hundred forty-three million, three hundred eight thousand, three hundred twenty".