4028928 has 80 divisors (see below), whose sum is σ = 11162976. Its totient is φ = 1290240.

The previous prime is 4028923. The next prime is 4028929. The reversal of 4028928 is 8298204.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028923) 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, 66018 + ... + 66078.

Almost surely, 2^4028928 is an apocalyptic number.

4028928 is a gapful number since it is divisible by the number (48) 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 4028928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5581488).

4028928 is an abundant number, since it is smaller than the sum of its proper divisors (7134048).

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

4028928 is an equidigital number, since it uses as much as digits as its factorization.

4028928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 4028928 is about 2007.2189716122. The cubic root of 4028928 is about 159.1218558771.

The spelling of 4028928 in words is "four million, twenty-eight thousand, nine hundred twenty-eight".