520320 has 64 divisors (see below), whose sum is σ = 1664640. Its totient is φ = 138240.

The previous prime is 520313. The next prime is 520339. The reversal of 520320 is 23025.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 520296 and 520305.

It is an unprimeable number.

520320 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1785 + ... + 2055.

It is an arithmetic number, because the mean of its divisors is an integer number (26010).

2⁵²⁰³²⁰ 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 520320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (832320).

520320 is an abundant number, since it is smaller than the sum of its proper divisors (1144320).

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

520320 is a wasteful number, since it uses less digits than its factorization.

520320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 12.

The square root of 520320 is about 721.3321010464. The cubic root of 520320 is about 80.4310070745.

Adding to 520320 its reverse (23025), we get a palindrome (543345).

The spelling of 520320 in words is "five hundred twenty thousand, three hundred twenty".