320321004 has 48 divisors (see below), whose sum is σ = 804386016. Its totient is φ = 98841600.

The previous prime is 320321003. The next prime is 320321011. The reversal of 320321004 is 400123023.

It is not an unprimeable number, because it can be changed into a prime (320321003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427 + ... + 25314.

It is an arithmetic number, because the mean of its divisors is an integer number (16758042).

Almost surely, 2^320321004 is an apocalyptic number.

320321004 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320321004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402193008).

320321004 is an abundant number, since it is smaller than the sum of its proper divisors (484065012).

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

320321004 is a wasteful number, since it uses less digits than its factorization.

320321004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25826 (or 25824 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 320321004 is about 17897.5139055680. The cubic root of 320321004 is about 684.2190143695.

Adding to 320321004 its reverse (400123023), we get a palindrome (720444027).

The spelling of 320321004 in words is "three hundred twenty million, three hundred twenty-one thousand, four".