243532240 has 80 divisors (see below), whose sum is σ = 649244160. Its totient is φ = 83220480.

The previous prime is 243532217. The next prime is 243532241. The reversal of 243532240 is 42235342.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×243532240³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243532241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240856 + ... + 241864.

It is an arithmetic number, because the mean of its divisors is an integer number (8115552).

Almost surely, 2^243532240 is an apocalyptic number.

243532240 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 243532240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324622080).

243532240 is an abundant number, since it is smaller than the sum of its proper divisors (405711920).

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

243532240 is a wasteful number, since it uses less digits than its factorization.

243532240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460 (or 1454 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 243532240 is about 15605.5195363692. The cubic root of 243532240 is about 624.4804129666.

Adding to 243532240 its reverse (42235342), we get a palindrome (285767582).

The spelling of 243532240 in words is "two hundred forty-three million, five hundred thirty-two thousand, two hundred forty".