It is a tau number, because it is divible by the number of its divisors (8).
It is a plaindrome in base 11 and base 12.
It is a nialpdrome in base 8 and base 16.
It is a zygodrome in base 2.
It is a congruent number.
It is an unprimeable number.
23992 is an apocalyptic number.
It is an amenable number.
3992 is a wasteful number, since it uses less digits than its factorization.
3992 is an odious number, because the sum of its binary digits is odd.
The square root of 3992 is about 63.1822759957. The cubic root of 3992 is about 15.8634207830.
Subtracting from 3992 its sum of digits (23), we obtain a square (3969 = 632).
Subtracting from 3992 its reverse (2993), we obtain a palindrome (999).
The spelling of 3992 in words is "three thousand, nine hundred ninety-two".