321439104 has 320 divisors, whose sum is σ = 1129539840. Its totient is φ = 88833024.

The previous prime is 321439087. The next prime is 321439109. The reversal of 321439104 is 401934123.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321439109) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3120717 + ... + 3120819.

It is an arithmetic number, because the mean of its divisors is an integer number (3529812).

Almost surely, 2^321439104 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 321439104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (564769920).

321439104 is an abundant number, since it is smaller than the sum of its proper divisors (808100736).

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

321439104 is a wasteful number, since it uses less digits than its factorization.

321439104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 321439104 is about 17928.7228769927. The cubic root of 321439104 is about 685.0141926127.

The spelling of 321439104 in words is "three hundred twenty-one million, four hundred thirty-nine thousand, one hundred four".