428075 has 6 divisors (see below), whose sum is σ = 530844. Its totient is φ = 342440.

The previous prime is 428047. The next prime is 428083. The reversal of 428075 is 570824.

It is not a de Polignac number, because 428075 - 2¹⁸ = 165931 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8537 + ... + 8586.

It is an arithmetic number, because the mean of its divisors is an integer number (88474).

2⁴²⁸⁰⁷⁵ is an apocalyptic number.

428075 is a deficient number, since it is larger than the sum of its proper divisors (102769).

428075 is a wasteful number, since it uses less digits than its factorization.

428075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17133 (or 17128 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 428075 is about 654.2744072635. The cubic root of 428075 is about 75.3656221173.

Adding to 428075 its reverse (570824), we get a palindrome (998899).

The spelling of 428075 in words is "four hundred twenty-eight thousand, seventy-five".