243440134 has 16 divisors (see below), whose sum is σ = 425844000. Its totient is φ = 104331192.

The previous prime is 243440111. The next prime is 243440137. The reversal of 243440134 is 431044342.

It is a junction number, because it is equal to n+sod(n) for n = 243440099 and 243440108.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176749 + ... + 178120.

It is an arithmetic number, because the mean of its divisors is an integer number (26615250).

Almost surely, 2^243440134 is an apocalyptic number.

243440134 is a deficient number, since it is larger than the sum of its proper divisors (182403866).

243440134 is an equidigital number, since it uses as much as digits as its factorization.

243440134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354892 (or 354878 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 243440134 is about 15602.5681860391. The cubic root of 243440134 is about 624.4016750744.

Adding to 243440134 its reverse (431044342), we get a palindrome (674484476).

The spelling of 243440134 in words is "two hundred forty-three million, four hundred forty thousand, one hundred thirty-four".