520504140 has 96 divisors (see below), whose sum is σ = 1589575680. Its totient is φ = 126487296.

The previous prime is 520504133. The next prime is 520504157. The reversal of 520504140 is 41405025.

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 31 ways as a sum of consecutive naturals, for example, 57397 + ... + 65843.

It is an arithmetic number, because the mean of its divisors is an integer number (16558080).

Almost surely, 2^520504140 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 520504140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (794787840).

520504140 is an abundant number, since it is smaller than the sum of its proper divisors (1069071540).

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

520504140 is a wasteful number, since it uses less digits than its factorization.

520504140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8551 (or 8549 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 520504140 is about 22814.5598248136. The cubic root of 520504140 is about 804.4049406890.

Adding to 520504140 its reverse (41405025), we get a palindrome (561909165).

The spelling of 520504140 in words is "five hundred twenty million, five hundred four thousand, one hundred forty".