520040 has 16 divisors (see below), whose sum is σ = 1170180. Its totient is φ = 208000.

The previous prime is 520031. The next prime is 520043. The reversal of 520040 is 40025.

It can be written as a sum of positive squares in 2 ways, for example, as 438244 + 81796 = 662^2 + 286^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 520040.

It is not an unprimeable number, because it can be changed into a prime (520043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6461 + ... + 6540.

2⁵²⁰⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

520040 is an abundant number, since it is smaller than the sum of its proper divisors (650140).

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

520040 is a wasteful number, since it uses less digits than its factorization.

520040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13012 (or 13008 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 520040 is about 721.1379895693. The cubic root of 520040 is about 80.4165770296.

Adding to 520040 its reverse (40025), we get a palindrome (560065).

The spelling of 520040 in words is "five hundred twenty thousand, forty".