320040972 has 36 divisors (see below), whose sum is σ = 830860576. Its totient is φ = 103796640.

The previous prime is 320040943. The next prime is 320040983. The reversal of 320040972 is 279040023.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 118804 + ... + 121467.

Almost surely, 2^320040972 is an apocalyptic number.

It is an amenable number.

320040972 is an abundant number, since it is smaller than the sum of its proper divisors (510819604).

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

320040972 is a wasteful number, since it uses less digits than its factorization.

320040972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240318 (or 240313 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 320040972 is about 17889.6889855581. The cubic root of 320040972 is about 684.0195695642.

Adding to 320040972 its reverse (279040023), we get a palindrome (599080995).

The spelling of 320040972 in words is "three hundred twenty million, forty thousand, nine hundred seventy-two".