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11866 = 217349
BaseRepresentation
bin10111001011010
3121021111
42321122
5334431
6130534
746411
oct27132
917244
1011866
118a08
126a4a
13552a
144478
1537b1
hex2e5a

11866 has 8 divisors (see below), whose sum is σ = 18900. Its totient is φ = 5568.

The previous prime is 11863. The next prime is 11867. The reversal of 11866 is 66811.

It can be written as a sum of positive squares in 2 ways, for example, as 11025 + 841 = 105^2 + 29^2 .

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

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (11863) 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, 141 + ... + 208.

211866 is an apocalyptic number.

11866 is a deficient number, since it is larger than the sum of its proper divisors (7034).

11866 is a wasteful number, since it uses less digits than its factorization.

11866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368.

The product of its digits is 288, while the sum is 22.

The square root of 11866 is about 108.9311709292. The cubic root of 11866 is about 22.8087480538.

Subtracting 11866 from its reverse (66811), we obtain a palindrome (54945).

The spelling of 11866 in words is "eleven thousand, eight hundred sixty-six".

Divisors: 1 2 17 34 349 698 5933 11866