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8218 = 27587
BaseRepresentation
bin10000000011010
3102021101
42000122
5230333
6102014
732650
oct20032
912241
108218
1161a1
12490a
133982
142dd0
15267d
hex201a

8218 has 8 divisors (see below), whose sum is σ = 14112. Its totient is φ = 3516.

The previous prime is 8209. The next prime is 8219. The reversal of 8218 is 8128.

It is a happy number.

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

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 8195 and 8204.

It is not an unprimeable number, because it can be changed into a prime (8219) by changing a digit.

8218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280 + ... + 307.

It is an arithmetic number, because the mean of its divisors is an integer number (1764).

28218 is an apocalyptic number.

8218 is a deficient number, since it is larger than the sum of its proper divisors (5894).

8218 is a wasteful number, since it uses less digits than its factorization.

8218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596.

The product of its digits is 128, while the sum is 19.

The square root of 8218 is about 90.6531852722. The cubic root of 8218 is about 20.1800410641.

It can be divided in two parts, 82 and 18, that added together give a square (100 = 102).

The spelling of 8218 in words is "eight thousand, two hundred eighteen".

Divisors: 1 2 7 14 587 1174 4109 8218