Adding to 15984 its product of digits (1440), we get a square (17424 = 1322).
Multipling 15984 by its reverse (48951), we get a square (782432784 = 279722).
15984 is nontrivially palindromic in base 11.
It is an Ulam number.
It is a nialpdrome in base 12.
It is a zygodrome in base 2.
It is a congruent number.
It is an unprimeable number.
15984 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
215984 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 15984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
15984 is a wasteful number, since it uses less digits than its factorization.
15984 is an evil number, because the sum of its binary digits is even.
The square root of 15984 is about 126.4278450342. The cubic root of 15984 is about 25.1900187229.
The spelling of 15984 in words is "fifteen thousand, nine hundred eighty-four".