243442210440 has 512 divisors, whose sum is σ = 883366041600. Its totient is φ = 52889763840.

The previous prime is 243442210433. The next prime is 243442210447. The reversal of 243442210440 is 44012244342.

It is an interprime number because it is at equal distance from previous prime (243442210433) and next prime (243442210447).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 243442210398 and 243442210407.

It is not an unprimeable number, because it can be changed into a prime (243442210447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 84031072 + ... + 84033968.

It is an arithmetic number, because the mean of its divisors is an integer number (1725324300).

Almost surely, 2^243442210440 is an apocalyptic number.

243442210440 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 243442210440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441683020800).

243442210440 is an abundant number, since it is smaller than the sum of its proper divisors (639923831160).

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

243442210440 is a wasteful number, since it uses less digits than its factorization.

243442210440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077 (or 3073 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 243442210440 its reverse (44012244342), we get a palindrome (287454454782).

The spelling of 243442210440 in words is "two hundred forty-three billion, four hundred forty-two million, two hundred ten thousand, four hundred forty".