4028556 has 48 divisors (see below), whose sum is σ = 10841600. Its totient is φ = 1140480.

The previous prime is 4028539. The next prime is 4028561. The reversal of 4028556 is 6558204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16596 + ... + 16836.

Almost surely, 2^4028556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4028556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5420800).

4028556 is an abundant number, since it is smaller than the sum of its proper divisors (6813044).

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

4028556 is a wasteful number, since it uses less digits than its factorization.

4028556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 4028556 is about 2007.1263039480. The cubic root of 4028556 is about 159.1169583665.

The spelling of 4028556 in words is "four million, twenty-eight thousand, five hundred fifty-six".