320704 has 14 divisors (see below), whose sum is σ = 636524. Its totient is φ = 160320.

The previous prime is 320699. The next prime is 320713. The reversal of 320704 is 407023.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

320704 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 as a sum of consecutive naturals, namely, 2442 + ... + 2569.

It is an arithmetic number, because the mean of its divisors is an integer number (45466).

2³²⁰⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

320704 is a deficient number, since it is larger than the sum of its proper divisors (315820).

320704 is an equidigital number, since it uses as much as digits as its factorization.

320704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5023 (or 5013 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 320704 is about 566.3073370529. The cubic root of 320704 is about 68.4491604229.

Adding to 320704 its reverse (407023), we get a palindrome (727727).

It can be divided in two parts, 320 and 704, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 320704 in words is "three hundred twenty thousand, seven hundred four", and thus it is an iban number.