520530144 has 24 divisors (see below), whose sum is σ = 1366391880. Its totient is φ = 173510016.

The previous prime is 520530139. The next prime is 520530151. The reversal of 520530144 is 441035025.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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, 2710999 + ... + 2711190.

It is an arithmetic number, because the mean of its divisors is an integer number (56932995).

Almost surely, 2^520530144 is an apocalyptic number.

It is an amenable number.

520530144 is an abundant number, since it is smaller than the sum of its proper divisors (845861736).

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

520530144 is a wasteful number, since it uses less digits than its factorization.

520530144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5422202 (or 5422194 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 520530144 is about 22815.1297169225. The cubic root of 520530144 is about 804.4183362902.

Adding to 520530144 its reverse (441035025), we get a palindrome (961565169).

The spelling of 520530144 in words is "five hundred twenty million, five hundred thirty thousand, one hundred forty-four".