520620 has 24 divisors (see below), whose sum is σ = 1457904. Its totient is φ = 138816.

The previous prime is 520609. The next prime is 520621. The reversal of 520620 is 26025.

520620 = 94² + 95² + ... + 133².

520620 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×520620³ = 423334631706984000, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 520620.

It is not an unprimeable number, because it can be changed into a prime (520621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4279 + ... + 4398.

It is an arithmetic number, because the mean of its divisors is an integer number (60746).

2⁵²⁰⁶²⁰ is an apocalyptic number.

It is an amenable number.

520620 is an abundant number, since it is smaller than the sum of its proper divisors (937284).

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

520620 is a wasteful number, since it uses less digits than its factorization.

520620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8689 (or 8687 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 520620 is about 721.5400196801. The cubic root of 520620 is about 80.4464620933.

Adding to 520620 its reverse (26025), we get a palindrome (546645).

The spelling of 520620 in words is "five hundred twenty thousand, six hundred twenty".