921984 has 80 divisors (see below), whose sum is σ = 2857020. Its totient is φ = 263424.

The previous prime is 921959. The next prime is 921989. The reversal of 921984 is 489129.

Its product of digits (5184) is a multiple of the sum of its prime divisors (12).

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.

It is not an unprimeable number, because it can be changed into a prime (921989) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 131709 + ... + 131715.

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).

921984 is an abundant number, since it is smaller than the sum of its proper divisors (1935036).

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 sum of its prime factors is 45 (or 12 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

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".