428285 has 16 divisors (see below), whose sum is σ = 604800. Its totient is φ = 287040.

The previous prime is 428273. The next prime is 428297. The reversal of 428285 is 582824.

It is an interprime number because it is at equal distance from previous prime (428273) and next prime (428297).

It is not a de Polignac number, because 428285 - 2⁶ = 428221 is a prime.

It is a Curzon number.

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 428285.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416 + ... + 1014.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2⁴²⁸²⁸⁵ is an apocalyptic number.

It is an amenable number.

428285 is a deficient number, since it is larger than the sum of its proper divisors (176515).

428285 is a wasteful number, since it uses less digits than its factorization.

428285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628.

The product of its digits is 5120, while the sum is 29.

The square root of 428285 is about 654.4348707091. The cubic root of 428285 is about 75.3779440961.

The spelling of 428285 in words is "four hundred twenty-eight thousand, two hundred eighty-five".