Search a number
-
+
686285 = 5294733
BaseRepresentation
bin10100111100011001101
31021212101222
42213203031
5133430120
622413125
75555555
oct2474315
91255358
10686285
11429686
122911a5
131b04b2
1413c165
15d8525
hexa78cd

686285 has 8 divisors (see below), whose sum is σ = 852120. Its totient is φ = 529984.

The previous prime is 686269. The next prime is 686293. The reversal of 686285 is 582686.

686285 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in 4 ways, for example, as 17161 + 669124 = 131^2 + 818^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 686285 - 24 = 686269 is a prime.

It is a magnanimous number.

686285 is a nontrivial repdigit in base 7.

It is a plaindrome in base 7.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2222 + ... + 2511.

It is an arithmetic number, because the mean of its divisors is an integer number (106515).

2686285 is an apocalyptic number.

It is an amenable number.

686285 is a deficient number, since it is larger than the sum of its proper divisors (165835).

686285 is a wasteful number, since it uses less digits than its factorization.

686285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4767.

The product of its digits is 23040, while the sum is 35.

The square root of 686285 is about 828.4232010271. The cubic root of 686285 is about 88.2066853220.

The spelling of 686285 in words is "six hundred eighty-six thousand, two hundred eighty-five".

Divisors: 1 5 29 145 4733 23665 137257 686285