428028 has 24 divisors (see below), whose sum is σ = 1019088. Its totient is φ = 139776.

The previous prime is 428027. The next prime is 428033. The reversal of 428028 is 820824.

It is a junction number, because it is equal to n+sod(n) for n = 427989 and 428007.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428028.

It is not an unprimeable number, because it can be changed into a prime (428023) 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, 300 + ... + 972.

It is an arithmetic number, because the mean of its divisors is an integer number (42462).

2⁴²⁸⁰²⁸ is an apocalyptic number.

It is an amenable number.

428028 is an abundant number, since it is smaller than the sum of its proper divisors (591060).

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

428028 is a wasteful number, since it uses less digits than its factorization.

428028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 428028 is about 654.2384886263. The cubic root of 428028 is about 75.3628637892.

The spelling of 428028 in words is "four hundred twenty-eight thousand, twenty-eight".