320420 has 24 divisors (see below), whose sum is σ = 692664. Its totient is φ = 124416.

The previous prime is 320417. The next prime is 320431. The reversal of 320420 is 24023.

It can be written as a sum of positive squares in 4 ways, for example, as 33124 + 287296 = 182^2 + 536^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (28861).

2³²⁰⁴²⁰ 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 320420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346332).

320420 is an abundant number, since it is smaller than the sum of its proper divisors (372244).

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

320420 is a wasteful number, since it uses less digits than its factorization.

320420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 320420 is about 566.0565342790. The cubic root of 320420 is about 68.4289493637.

Adding to 320420 its reverse (24023), we get a palindrome (344443).

The spelling of 320420 in words is "three hundred twenty thousand, four hundred twenty", and thus it is an iban number.