243325440 has 240 divisors, whose sum is σ = 861775200. Its totient is φ = 63430656.

The previous prime is 243325393. The next prime is 243325469. The reversal of 243325440 is 44523342.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1359271 + ... + 1359449.

It is an arithmetic number, because the mean of its divisors is an integer number (3590730).

Almost surely, 2^243325440 is an apocalyptic number.

243325440 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 243325440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430887600).

243325440 is an abundant number, since it is smaller than the sum of its proper divisors (618449760).

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

243325440 is a wasteful number, since it uses less digits than its factorization.

243325440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 243325440 is about 15598.8922683632. The cubic root of 243325440 is about 624.3035997977.

Adding to 243325440 its reverse (44523342), we get a palindrome (287848782).

The spelling of 243325440 in words is "two hundred forty-three million, three hundred twenty-five thousand, four hundred forty".