4423728 has 40 divisors (see below), whose sum is σ = 11927808. Its totient is φ = 1410112.

The previous prime is 4423721. The next prime is 4423729. The reversal of 4423728 is 8273244.

4423728 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 4⁸ + 4¹¹ + 2⁵ + 3² + 7 + 2¹⁷ + 8⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 4423695 and 4423704.

It is not an unprimeable number, because it can be changed into a prime (4423721) 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, 900 + ... + 3107.

Almost surely, 2^4423728 is an apocalyptic number.

4423728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

4423728 is an abundant number, since it is smaller than the sum of its proper divisors (7504080).

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

4423728 is a wasteful number, since it uses less digits than its factorization.

4423728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4041 (or 4035 counting only the distinct ones).

The product of its digits is 10752, while the sum is 30.

The square root of 4423728 is about 2103.2660316755. The cubic root of 4423728 is about 164.1582846205.

It can be divided in two parts, 4423 and 728, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 4423728 in words is "four million, four hundred twenty-three thousand, seven hundred twenty-eight".