428585 has 4 divisors (see below), whose sum is σ = 514308. Its totient is φ = 342864.

The previous prime is 428579. The next prime is 428629. The reversal of 428585 is 585824.

428585 is nontrivially palindromic in base 4, base 7 and base 8.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 118336 + 310249 = 344^2 + 557^2 .

It is a cyclic number.

It is not a de Polignac number, because 428585 - 2⁴ = 428569 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428585.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42854 + ... + 42863.

It is an arithmetic number, because the mean of its divisors is an integer number (128577).

2⁴²⁸⁵⁸⁵ is an apocalyptic number.

It is an amenable number.

428585 is a deficient number, since it is larger than the sum of its proper divisors (85723).

428585 is an equidigital number, since it uses as much as digits as its factorization.

428585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85722.

The product of its digits is 12800, while the sum is 32.

The square root of 428585 is about 654.6640359757. The cubic root of 428585 is about 75.3955399379.

The spelling of 428585 in words is "four hundred twenty-eight thousand, five hundred eighty-five".