320004432 has 100 divisors (see below), whose sum is σ = 1010429376. Its totient is φ = 96966720.

The previous prime is 320004427. The next prime is 320004439. The reversal of 320004432 is 234400023.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320004439) 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 19 ways as a sum of consecutive naturals, for example, 3033 + ... + 25479.

Almost surely, 2^320004432 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 320004432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505214688).

320004432 is an abundant number, since it is smaller than the sum of its proper divisors (690424944).

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

320004432 is a wasteful number, since it uses less digits than its factorization.

320004432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22478 (or 22463 counting only the distinct ones).

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

The square root of 320004432 is about 17888.6676977353. The cubic root of 320004432 is about 683.9935364117.

Adding to 320004432 its reverse (234400023), we get a palindrome (554404455).

The spelling of 320004432 in words is "three hundred twenty million, four thousand, four hundred thirty-two".