320432004 has 24 divisors (see below), whose sum is σ = 830749920. Its totient is φ = 106810632.

The previous prime is 320431999. The next prime is 320432023. The reversal of 320432004 is 400234023.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1483374 + ... + 1483589.

It is an arithmetic number, because the mean of its divisors is an integer number (34614580).

Almost surely, 2^320432004 is an apocalyptic number.

It is an amenable number.

320432004 is an abundant number, since it is smaller than the sum of its proper divisors (510317916).

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

320432004 is a wasteful number, since it uses less digits than its factorization.

320432004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966976 (or 2966968 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 320432004 is about 17900.6146263194. The cubic root of 320432004 is about 684.2980387842.

Adding to 320432004 its reverse (400234023), we get a palindrome (720666027).

The spelling of 320432004 in words is "three hundred twenty million, four hundred thirty-two thousand, four".