320772 has 12 divisors (see below), whose sum is σ = 748496. Its totient is φ = 106920.

The previous prime is 320767. The next prime is 320791. The reversal of 320772 is 277023.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

320772 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13354 + ... + 13377.

2³²⁰⁷⁷² is an apocalyptic number.

It is an amenable number.

320772 is an abundant number, since it is smaller than the sum of its proper divisors (427724).

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

320772 is a wasteful number, since it uses less digits than its factorization.

320772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26738 (or 26736 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 320772 is about 566.3673719416. The cubic root of 320772 is about 68.4539979200.

Adding to 320772 its reverse (277023), we get a palindrome (597795).

The spelling of 320772 in words is "three hundred twenty thousand, seven hundred seventy-two", and thus it is an iban number.