320872 has 16 divisors (see below), whose sum is σ = 633600. Its totient is φ = 151920.

The previous prime is 320867. The next prime is 320899. The reversal of 320872 is 278023.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (39600).

2³²⁰⁸⁷² is an apocalyptic number.

It is an amenable number.

320872 is a deficient number, since it is larger than the sum of its proper divisors (312728).

320872 is a wasteful number, since it uses less digits than its factorization.

320872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136 (or 2132 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 320872 is about 566.4556469839. The cubic root of 320872 is about 68.4611106445.

Adding to 320872 its reverse (278023), we get a palindrome (598895).

Subtracting from 320872 its reverse (278023), we obtain a square (42849 = 207²).

The spelling of 320872 in words is "three hundred twenty thousand, eight hundred seventy-two".