320131240 has 64 divisors (see below), whose sum is σ = 846236160. Its totient is φ = 107454720.

The previous prime is 320131219. The next prime is 320131277. The reversal of 320131240 is 42131023.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22264 + ... + 33703.

It is an arithmetic number, because the mean of its divisors is an integer number (13222440).

Almost surely, 2^320131240 is an apocalyptic number.

It is an amenable number.

320131240 is an abundant number, since it is smaller than the sum of its proper divisors (526104920).

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

320131240 is a wasteful number, since it uses less digits than its factorization.

320131240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56002 (or 55998 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 320131240 is about 17892.2117134803. The cubic root of 320131240 is about 684.0838730751.

Adding to 320131240 its reverse (42131023), we get a palindrome (362262263).

The spelling of 320131240 in words is "three hundred twenty million, one hundred thirty-one thousand, two hundred forty".