320430304240 has 20 divisors (see below), whose sum is σ = 745000457544. Its totient is φ = 128172121664.

The previous prime is 320430304223. The next prime is 320430304247. The reversal of 320430304240 is 42403034023.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320430304247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2002689322 + ... + 2002689481.

Almost surely, 2^320430304240 is an apocalyptic number.

It is an amenable number.

320430304240 is an abundant number, since it is smaller than the sum of its proper divisors (424570153304).

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

320430304240 is a wasteful number, since it uses less digits than its factorization.

320430304240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4005378816 (or 4005378810 counting only the distinct ones).

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

Adding to 320430304240 its reverse (42403034023), we get a palindrome (362833338263).

The spelling of 320430304240 in words is "three hundred twenty billion, four hundred thirty million, three hundred four thousand, two hundred forty".