320128004 has 12 divisors (see below), whose sum is σ = 640256064. Its totient is φ = 137197704.

The previous prime is 320127971. The next prime is 320128009. The reversal of 320128004 is 400821023.

320128004 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

320128004 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (320128009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5716544 + ... + 5716599.

It is an arithmetic number, because the mean of its divisors is an integer number (53354672).

Almost surely, 2^320128004 is an apocalyptic number.

It is an amenable number.

320128004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

320128004 is a wasteful number, since it uses less digits than its factorization.

320128004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11433154 (or 11433152 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 320128004 is about 17892.1212828440. The cubic root of 320128004 is about 684.0815680799.

Adding to 320128004 its reverse (400821023), we get a palindrome (720949027).

The spelling of 320128004 in words is "three hundred twenty million, one hundred twenty-eight thousand, four".