4420724 has 48 divisors (see below), whose sum is σ = 9977856. Its totient is φ = 1663200.

The previous prime is 4420721. The next prime is 4420729. The reversal of 4420724 is 4270244.

4420724 = 253² + 254² + ... + 308².

It is a self number, because there is not a number n which added to its sum of digits gives 4420724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4420721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9317 + ... + 9779.

It is an arithmetic number, because the mean of its divisors is an integer number (207872).

Almost surely, 2^4420724 is an apocalyptic number.

4420724 is a gapful number since it is divisible by the number (44) 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 4420724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4988928).

4420724 is an abundant number, since it is smaller than the sum of its proper divisors (5557132).

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

4420724 is a wasteful number, since it uses less digits than its factorization.

4420724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 4420724 is about 2102.5517829533. The cubic root of 4420724 is about 164.1211181437.

Adding to 4420724 its reverse (4270244), we get a palindrome (8690968).

The spelling of 4420724 in words is "four million, four hundred twenty thousand, seven hundred twenty-four".