321984 has 84 divisors (see below), whose sum is σ = 1017016. Its totient is φ = 96768.

The previous prime is 321983. The next prime is 321991. The reversal of 321984 is 489123.

It is a nude number because it is divisible by every one of its digits.

It is one of the 548 Lynch-Bell numbers.

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 321984.

It is not an unprimeable number, because it can be changed into a prime (321983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7467 + ... + 7509.

2³²¹⁹⁸⁴ 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 321984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508508).

321984 is an abundant number, since it is smaller than the sum of its proper divisors (695032).

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

321984 is a wasteful number, since it uses less digits than its factorization.

321984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 61 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 321984 is about 567.4363400418. The cubic root of 321984 is about 68.5401047409.

It can be divided in two parts, 32 and 1984, that added together give a triangular number (2016 = T₆₃).

The spelling of 321984 in words is "three hundred twenty-one thousand, nine hundred eighty-four".