243443230440 has 128 divisors (see below), whose sum is σ = 762334813440. Its totient is φ = 62075160576.

The previous prime is 243443230439. The next prime is 243443230469. The reversal of 243443230440 is 44032344342.

243443230440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9462234 + ... + 9487926.

It is an arithmetic number, because the mean of its divisors is an integer number (5955740730).

Almost surely, 2^243443230440 is an apocalyptic number.

243443230440 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 243443230440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381167406720).

243443230440 is an abundant number, since it is smaller than the sum of its proper divisors (518891583000).

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

243443230440 is a wasteful number, since it uses less digits than its factorization.

243443230440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29163 (or 29159 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 33.

Adding to 243443230440 its reverse (44032344342), we get a palindrome (287475574782).

The spelling of 243443230440 in words is "two hundred forty-three billion, four hundred forty-three million, two hundred thirty thousand, four hundred forty".