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BaseRepresentation
bin10000001011101
3102100212
42001131
5231120
6102205
733104
oct20135
912325
108285
116252
124965
133a04
14303b
1526c5
hex205d

8285 has 4 divisors (see below), whose sum is σ = 9948. Its totient is φ = 6624.

The previous prime is 8273. The next prime is 8287. The reversal of 8285 is 5828.

8285 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 2809 + 5476 = 53^2 + 74^2 .

It is a cyclic number.

It is not a de Polignac number, because 8285 - 24 = 8269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824 + ... + 833.

It is an arithmetic number, because the mean of its divisors is an integer number (2487).

28285 is an apocalyptic number.

It is an amenable number.

8285 is a deficient number, since it is larger than the sum of its proper divisors (1663).

8285 is a wasteful number, since it uses less digits than its factorization.

8285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662.

The product of its digits is 640, while the sum is 23.

The square root of 8285 is about 91.0219753686. The cubic root of 8285 is about 20.2347342142.

The spelling of 8285 in words is "eight thousand, two hundred eighty-five".

Divisors: 1 5 1657 8285