321839616 has 160 divisors (see below), whose sum is σ = 1007614080. Its totient is φ = 89358336.

The previous prime is 321839611. The next prime is 321839633. The reversal of 321839616 is 616938123.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321839611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397420 + ... + 398228.

It is an arithmetic number, because the mean of its divisors is an integer number (6297588).

Almost surely, 2^321839616 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 321839616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (503807040).

321839616 is an abundant number, since it is smaller than the sum of its proper divisors (685774464).

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

321839616 is an equidigital number, since it uses as much as digits as its factorization.

321839616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 858 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 321839616 is about 17939.8889628671. Note that the first 3 decimals coincide. The cubic root of 321839616 is about 685.2985829588.

The spelling of 321839616 in words is "three hundred twenty-one million, eight hundred thirty-nine thousand, six hundred sixteen".