4224440 has 32 divisors (see below), whose sum is σ = 10370160. Its totient is φ = 1536000.

The previous prime is 4224439. The next prime is 4224443. The reversal of 4224440 is 444224.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4224443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4361 + ... + 5240.

Almost surely, 2^4224440 is an apocalyptic number.

4224440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4224440 is an abundant number, since it is smaller than the sum of its proper divisors (6145720).

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

4224440 is a wasteful number, since it uses less digits than its factorization.

4224440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9623 (or 9619 counting only the distinct ones).

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

The square root of 4224440 is about 2055.3442534038. The cubic root of 4224440 is about 161.6552134634.

Adding to 4224440 its reverse (444224), we get a palindrome (4668664).

It can be divided in two parts, 4224 and 440, that added together give a palindrome (4664).

The spelling of 4224440 in words is "four million, two hundred twenty-four thousand, four hundred forty".