43441440 has 144 divisors (see below), whose sum is σ = 159268032. Its totient is φ = 9924096.

The previous prime is 43441439. The next prime is 43441451. The reversal of 43441440 is 4414434.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 43441440.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22597 + ... + 24443.

It is an arithmetic number, because the mean of its divisors is an integer number (1106028).

Almost surely, 2^43441440 is an apocalyptic number.

43441440 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 43441440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79634016).

43441440 is an abundant number, since it is smaller than the sum of its proper divisors (115826592).

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

43441440 is a wasteful number, since it uses less digits than its factorization.

43441440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879 (or 1864 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 43441440 is about 6591.0120618916. The cubic root of 43441440 is about 351.5345949802.

Adding to 43441440 its reverse (4414434), we get a palindrome (47855874).

The spelling of 43441440 in words is "forty-three million, four hundred forty-one thousand, four hundred forty".