520424424 has 96 divisors (see below), whose sum is σ = 1532130600. Its totient is φ = 158630400.

The previous prime is 520424419. The next prime is 520424441. The reversal of 520424424 is 424424025.

It can be written as a sum of positive squares in 4 ways, for example, as 216619524 + 303804900 = 14718^2 + 17430^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99474 + ... + 104574.

Almost surely, 2^520424424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520424424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766065300).

520424424 is an abundant number, since it is smaller than the sum of its proper divisors (1011706176).

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

520424424 is a wasteful number, since it uses less digits than its factorization.

520424424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235 (or 5228 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 520424424 is about 22812.8127156649. The cubic root of 520424424 is about 804.3638733127.

Adding to 520424424 its reverse (424424025), we get a palindrome (944848449).

The spelling of 520424424 in words is "five hundred twenty million, four hundred twenty-four thousand, four hundred twenty-four".