520530440 has 16 divisors (see below), whose sum is σ = 1171193580. Its totient is φ = 208212160.

The previous prime is 520530431. The next prime is 520530443. The reversal of 520530440 is 44035025.

It can be written as a sum of positive squares in 2 ways, for example, as 441924484 + 78605956 = 21022^2 + 8866^2 .

It is not an unprimeable number, because it can be changed into a prime (520530443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6506591 + ... + 6506670.

Almost surely, 2^520530440 is an apocalyptic number.

It is an amenable number.

520530440 is an abundant number, since it is smaller than the sum of its proper divisors (650663140).

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

520530440 is a wasteful number, since it uses less digits than its factorization.

520530440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13013272 (or 13013268 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 520530440 is about 22815.1362038450. The cubic root of 520530440 is about 804.4184887680.

Adding to 520530440 its reverse (44035025), we get a palindrome (564565465).

The spelling of 520530440 in words is "five hundred twenty million, five hundred thirty thousand, four hundred forty".