320323040140 has 12 divisors (see below), whose sum is σ = 672678384336. Its totient is φ = 128129216048.

The previous prime is 320323040111. The next prime is 320323040143. The reversal of 320323040140 is 41040323023.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (320323040143) 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, 8008075984 + ... + 8008076023.

It is an arithmetic number, because the mean of its divisors is an integer number (56056532028).

Almost surely, 2^320323040140 is an apocalyptic number.

It is an amenable number.

320323040140 is an abundant number, since it is smaller than the sum of its proper divisors (352355344196).

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

320323040140 is a wasteful number, since it uses less digits than its factorization.

320323040140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16016152016 (or 16016152014 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 320323040140 its reverse (41040323023), we get a palindrome (361363363163).

The spelling of 320323040140 in words is "three hundred twenty billion, three hundred twenty-three million, forty thousand, one hundred forty".