520530540 has 24 divisors (see below), whose sum is σ = 1457485680. Its totient is φ = 138808128.

The previous prime is 520530533. The next prime is 520530553. The reversal of 520530540 is 45035025.

It is a self number, because there is not a number n which added to its sum of digits gives 520530540.

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, 4337695 + ... + 4337814.

It is an arithmetic number, because the mean of its divisors is an integer number (60728570).

Almost surely, 2^520530540 is an apocalyptic number.

It is an amenable number.

520530540 is an abundant number, since it is smaller than the sum of its proper divisors (936955140).

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

520530540 is a wasteful number, since it uses less digits than its factorization.

520530540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8675521 (or 8675519 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 520530540 is about 22815.1383953725. The cubic root of 520530540 is about 804.4185402807.

Adding to 520530540 its reverse (45035025), we get a palindrome (565565565).

The spelling of 520530540 in words is "five hundred twenty million, five hundred thirty thousand, five hundred forty".