320620 has 48 divisors (see below), whose sum is σ = 762048. Its totient is φ = 112640.

The previous prime is 320611. The next prime is 320627. The reversal of 320620 is 26023.

320620 = T₁₀₄ + T₁₀₅ + ... + T₁₄₄.

It is a self number, because there is not a number n which added to its sum of digits gives 320620.

It is not an unprimeable number, because it can be changed into a prime (320627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7800 + ... + 7840.

It is an arithmetic number, because the mean of its divisors is an integer number (15876).

2³²⁰⁶²⁰ 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 320620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381024).

320620 is an abundant number, since it is smaller than the sum of its proper divisors (441428).

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

320620 is a wasteful number, since it uses less digits than its factorization.

320620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 320620 is about 566.2331675202. The cubic root of 320620 is about 68.4431837471.

Adding to 320620 its reverse (26023), we get a palindrome (346643).

The spelling of 320620 in words is "three hundred twenty thousand, six hundred twenty".