243422440040 has 64 divisors (see below), whose sum is σ = 590327211600. Its totient is φ = 89803487232.

The previous prime is 243422439991. The next prime is 243422440057. The reversal of 243422440040 is 40044224342.

243422440040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 137770138276 + 105652301764 = 371174^2 + 325042^2 .

It is a junction number, because it is equal to n+sod(n) for n = 243422439985 and 243422440012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424166 + ... + 816554.

Almost surely, 2^243422440040 is an apocalyptic number.

243422440040 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 243422440040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295163605800).

243422440040 is an abundant number, since it is smaller than the sum of its proper divisors (346904771560).

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

243422440040 is a wasteful number, since it uses less digits than its factorization.

243422440040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393606 (or 393602 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 29.

Adding to 243422440040 its reverse (40044224342), we get a palindrome (283466664382).

The spelling of 243422440040 in words is "two hundred forty-three billion, four hundred twenty-two million, four hundred forty thousand, forty".