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11982 = 231997
BaseRepresentation
bin10111011001110
3121102210
42323032
5340412
6131250
746635
oct27316
917383
1011982
119003
126b26
1355b9
14451c
15383c
hex2ece

11982 has 8 divisors (see below), whose sum is σ = 23976. Its totient is φ = 3992.

The previous prime is 11981. The next prime is 11987. The reversal of 11982 is 28911.

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

11982 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 11982.

It is not an unprimeable number, because it can be changed into a prime (11981) 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, 993 + ... + 1004.

It is an arithmetic number, because the mean of its divisors is an integer number (2997).

211982 is an apocalyptic number.

11982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11988).

11982 is a wasteful number, since it uses less digits than its factorization.

11982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002.

The product of its digits is 144, while the sum is 21.

The square root of 11982 is about 109.4623222849. The cubic root of 11982 is about 22.8828319803.

The spelling of 11982 in words is "eleven thousand, nine hundred eighty-two".

Divisors: 1 2 3 6 1997 3994 5991 11982