4427728 has 20 divisors (see below), whose sum is σ = 8650240. Its totient is φ = 2195424.

The previous prime is 4427723. The next prime is 4427737. The reversal of 4427728 is 8277244.

It is a junction number, because it is equal to n+sod(n) for n = 4427693 and 4427702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4427723) 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 3 ways as a sum of consecutive naturals, for example, 943 + ... + 3121.

It is an arithmetic number, because the mean of its divisors is an integer number (432512).

Almost surely, 2^4427728 is an apocalyptic number.

It is an amenable number.

4427728 is a deficient number, since it is larger than the sum of its proper divisors (4222512).

4427728 is a wasteful number, since it uses less digits than its factorization.

4427728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314 (or 2308 counting only the distinct ones).

The product of its digits is 25088, while the sum is 34.

The square root of 4427728 is about 2104.2167188766. The cubic root of 4427728 is about 164.2077478278.

It can be divided in two parts, 44 and 27728, that added together give a palindrome (27772).

The spelling of 4427728 in words is "four million, four hundred twenty-seven thousand, seven hundred twenty-eight".