4439664 has 80 divisors (see below), whose sum is σ = 13094400. Its totient is φ = 1439424.

The previous prime is 4439663. The next prime is 4439671. The reversal of 4439664 is 4669344.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a d-powerful number, because it can be written as 4 + 4⁸ + 3¹¹ + 9² + 6⁴ + 6⁴ + 4¹¹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4439663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18457 + ... + 18695.

It is an arithmetic number, because the mean of its divisors is an integer number (163680).

Almost surely, 2^4439664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4439664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6547200).

4439664 is an abundant number, since it is smaller than the sum of its proper divisors (8654736).

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

4439664 is a wasteful number, since it uses less digits than its factorization.

4439664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 287 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 4439664 is about 2107.0510197905. The cubic root of 4439664 is about 164.3551691922.

The spelling of 4439664 in words is "four million, four hundred thirty-nine thousand, six hundred sixty-four".