320287172 has 24 divisors (see below), whose sum is σ = 569775360. Its totient is φ = 157510080.

The previous prime is 320287171. The next prime is 320287181. The reversal of 320287172 is 271782023.

It is not an unprimeable number, because it can be changed into a prime (320287171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86993 + ... + 90599.

It is an arithmetic number, because the mean of its divisors is an integer number (23740640).

Almost surely, 2^320287172 is an apocalyptic number.

It is an amenable number.

320287172 is a deficient number, since it is larger than the sum of its proper divisors (249488188).

320287172 is a wasteful number, since it uses less digits than its factorization.

320287172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971 (or 3969 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 320287172 is about 17896.5687214058. The cubic root of 320287172 is about 684.1949246674.

The spelling of 320287172 in words is "three hundred twenty million, two hundred eighty-seven thousand, one hundred seventy-two".