4028440 has 64 divisors (see below), whose sum is σ = 9999360. Its totient is φ = 1451520.

The previous prime is 4028429. The next prime is 4028441. The reversal of 4028440 is 448204.

4028440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028441) 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, 31657 + ... + 31783.

It is an arithmetic number, because the mean of its divisors is an integer number (156240).

Almost surely, 2^4028440 is an apocalyptic number.

4028440 is a gapful number since it is divisible by the number (40) 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 4028440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4999680).

4028440 is an abundant number, since it is smaller than the sum of its proper divisors (5970920).

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

4028440 is a wasteful number, since it uses less digits than its factorization.

4028440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 4028440 is about 2007.0974067045. The cubic root of 4028440 is about 159.1154311242.

The spelling of 4028440 in words is "four million, twenty-eight thousand, four hundred forty".