4428644 has 24 divisors (see below), whose sum is σ = 8509536. Its totient is φ = 2000000.

The previous prime is 4428643. The next prime is 4428689. The reversal of 4428644 is 4468244.

4428644 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×4428644² = 39225775357472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4428644.

It is not an unprimeable number, because it can be changed into a prime (4428643) 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, 10844 + ... + 11244.

It is an arithmetic number, because the mean of its divisors is an integer number (354564).

Almost surely, 2^4428644 is an apocalyptic number.

4428644 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

4428644 is a deficient number, since it is larger than the sum of its proper divisors (4080892).

4428644 is a wasteful number, since it uses less digits than its factorization.

4428644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 665 counting only the distinct ones).

The product of its digits is 24576, while the sum is 32.

The square root of 4428644 is about 2104.4343658095. The cubic root of 4428644 is about 164.2190707098.

The spelling of 4428644 in words is "four million, four hundred twenty-eight thousand, six hundred forty-four".