428485 has 12 divisors (see below), whose sum is σ = 552204. Its totient is φ = 318080.

The previous prime is 428473. The next prime is 428489. The reversal of 428485 is 584824.

It can be written as a sum of positive squares in 2 ways, for example, as 247009 + 181476 = 497^2 + 426^2 .

It is not a de Polignac number, because 428485 - 2¹³ = 420293 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6000 + ... + 6070.

It is an arithmetic number, because the mean of its divisors is an integer number (46017).

2⁴²⁸⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

428485 is a deficient number, since it is larger than the sum of its proper divisors (123719).

428485 is an equidigital number, since it uses as much as digits as its factorization.

428485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 93 counting only the distinct ones).

The product of its digits is 10240, while the sum is 31.

The square root of 428485 is about 654.5876564678. The cubic root of 428485 is about 75.3896755699.

The spelling of 428485 in words is "four hundred twenty-eight thousand, four hundred eighty-five".