4442240 has 64 divisors (see below), whose sum is σ = 11603520. Its totient is φ = 1612800.

The previous prime is 4442233. The next prime is 4442261. The reversal of 4442240 is 422444.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6725 + ... + 7355.

It is an arithmetic number, because the mean of its divisors is an integer number (181305).

Almost surely, 2^4442240 is an apocalyptic number.

4442240 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 4442240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5801760).

4442240 is an abundant number, since it is smaller than the sum of its proper divisors (7161280).

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

4442240 is a wasteful number, since it uses less digits than its factorization.

4442240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 4442240 is about 2107.6622120254. The cubic root of 4442240 is about 164.3869506557.

Adding to 4442240 its reverse (422444), we get a palindrome (4864684).

It can be divided in two parts, 4 and 442240, that added together give a palindrome (442244).

The spelling of 4442240 in words is "four million, four hundred forty-two thousand, two hundred forty".