428875 has 16 divisors (see below), whose sum is σ = 554112. Its totient is φ = 331200.

The previous prime is 428873. The next prime is 428899. The reversal of 428875 is 578824.

It is not a de Polignac number, because 428875 - 2¹ = 428873 is a prime.

It is a Duffinian number.

428875 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 428875.

It is not an unprimeable number, because it can be changed into a prime (428873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5839 + ... + 5911.

It is an arithmetic number, because the mean of its divisors is an integer number (34632).

2⁴²⁸⁸⁷⁵ is an apocalyptic number.

428875 is a deficient number, since it is larger than the sum of its proper divisors (125237).

428875 is an equidigital number, since it uses as much as digits as its factorization.

428875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 125 counting only the distinct ones).

The product of its digits is 17920, while the sum is 34.

The square root of 428875 is about 654.8854861730. The cubic root of 428875 is about 75.4125414482.

The spelling of 428875 in words is "four hundred twenty-eight thousand, eight hundred seventy-five".