428556 has 24 divisors (see below), whose sum is σ = 1016064. Its totient is φ = 140560.

The previous prime is 428551. The next prime is 428557. The reversal of 428556 is 655824.

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 428556.

It is not an unprimeable number, because it can be changed into a prime (428551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601 + ... + 1103.

It is an arithmetic number, because the mean of its divisors is an integer number (42336).

2⁴²⁸⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

428556 is an abundant number, since it is smaller than the sum of its proper divisors (587508).

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

428556 is a wasteful number, since it uses less digits than its factorization.

428556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 579 counting only the distinct ones).

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

The square root of 428556 is about 654.6418868358. The cubic root of 428556 is about 75.3938393651.

The spelling of 428556 in words is "four hundred twenty-eight thousand, five hundred fifty-six".