243440132 has 24 divisors (see below), whose sum is σ = 460287576. Its totient is φ = 111990528.

The previous prime is 243440111. The next prime is 243440137. The reversal of 243440132 is 231044342.

It can be written as a sum of positive squares in 4 ways, for example, as 19219456 + 224220676 = 4384^2 + 14974^2 .

It is a junction number, because it is equal to n+sod(n) for n = 243440098 and 243440107.

It is not an unprimeable number, because it can be changed into a prime (243440137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8798 + ... + 23754.

It is an arithmetic number, because the mean of its divisors is an integer number (19178649).

Almost surely, 2^243440132 is an apocalyptic number.

It is an amenable number.

243440132 is a deficient number, since it is larger than the sum of its proper divisors (216847444).

243440132 is a wasteful number, since it uses less digits than its factorization.

243440132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15287 (or 15285 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 243440132 is about 15602.5681219471. The cubic root of 243440132 is about 624.4016733645.

Adding to 243440132 its reverse (231044342), we get a palindrome (474484474).

The spelling of 243440132 in words is "two hundred forty-three million, four hundred forty thousand, one hundred thirty-two".