43443443440 has 80 divisors (see below), whose sum is σ = 104190518880. Its totient is φ = 16833623040.

The previous prime is 43443443413. The next prime is 43443443443. The reversal of 43443443440 is 4434434434.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 43443443440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43443443443) by changing a digit.

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, 645795 + ... + 709885.

It is an arithmetic number, because the mean of its divisors is an integer number (1302381486).

Almost surely, 2^43443443440 is an apocalyptic number.

43443443440 is a gapful number since it is divisible by the number (40) 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 43443443440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52095259440).

43443443440 is an abundant number, since it is smaller than the sum of its proper divisors (60747075440).

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

43443443440 is a wasteful number, since it uses less digits than its factorization.

43443443440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64370 (or 64364 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 37.

Adding to 43443443440 its reverse (4434434434), we get a palindrome (47877877874).

The spelling of 43443443440 in words is "forty-three billion, four hundred forty-three million, four hundred forty-three thousand, four hundred forty".