4443440 has 40 divisors (see below), whose sum is σ = 10497840. Its totient is φ = 1748736.

The previous prime is 4443433. The next prime is 4443463. The reversal of 4443440 is 443444.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4946 + ... + 5774.

It is an arithmetic number, because the mean of its divisors is an integer number (262446).

Almost surely, 2^4443440 is an apocalyptic number.

4443440 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 4443440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5248920).

4443440 is an abundant number, since it is smaller than the sum of its proper divisors (6054400).

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

4443440 is a wasteful number, since it uses less digits than its factorization.

4443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 903 counting only the distinct ones).

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

The square root of 4443440 is about 2107.9468684006. The cubic root of 4443440 is about 164.4017514904.

Adding to 4443440 its reverse (443444), we get a palindrome (4886884).

The spelling of 4443440 in words is "four million, four hundred forty-three thousand, four hundred forty".