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 921984.
2921984 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 921984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1428510).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
921984 is an frugal number, since it uses more digits than its factorization.
921984 is an evil number, because the sum of its binary digits is even.
The square root of 921984 is about 960.1999791710. The cubic root of 921984 is about 97.3287460568.
The spelling of 921984 in words is "nine hundred twenty-one thousand, nine hundred eighty-four".