320912 has 20 divisors (see below), whose sum is σ = 642816. Its totient is φ = 155040.

The previous prime is 320911. The next prime is 320923. The reversal of 320912 is 219023.

320912 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320912.

It is not an unprimeable number, because it can be changed into a prime (320911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173 + ... + 819.

2³²⁰⁹¹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321408).

320912 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

320912 is a wasteful number, since it uses less digits than its factorization.

320912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 320912 is about 566.4909531493. The cubic root of 320912 is about 68.4639553205.

Adding to 320912 its reverse (219023), we get a palindrome (539935).

The spelling of 320912 in words is "three hundred twenty thousand, nine hundred twelve".