43440440 has 64 divisors (see below), whose sum is σ = 104340960. Its totient is φ = 16220160.

The previous prime is 43440433. The next prime is 43440451. The reversal of 43440440 is 4404434.

43440440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131075 + ... + 131405.

Almost surely, 2^43440440 is an apocalyptic number.

43440440 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 43440440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52170480).

43440440 is an abundant number, since it is smaller than the sum of its proper divisors (60900520).

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

43440440 is a wasteful number, since it uses less digits than its factorization.

43440440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 43440440 is about 6590.9362005712. The cubic root of 43440440 is about 351.5318975766.

Adding to 43440440 its reverse (4404434), we get a palindrome (47844874).

The spelling of 43440440 in words is "forty-three million, four hundred forty thousand, four hundred forty".