320032432240 has 80 divisors (see below), whose sum is σ = 751182680160. Its totient is φ = 126791101440.

The previous prime is 320032432211. The next prime is 320032432241. The reversal of 320032432240 is 42234230023.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×320032432240³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320032432241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31709595 + ... + 31719685.

It is an arithmetic number, because the mean of its divisors is an integer number (9389783502).

Almost surely, 2^320032432240 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 320032432240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375591340080).

320032432240 is an abundant number, since it is smaller than the sum of its proper divisors (431150247920).

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

320032432240 is a wasteful number, since it uses less digits than its factorization.

320032432240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13850 (or 13844 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 25.

Adding to 320032432240 its reverse (42234230023), we get a palindrome (362266662263).

The spelling of 320032432240 in words is "three hundred twenty billion, thirty-two million, four hundred thirty-two thousand, two hundred forty".