520530240 has 56 divisors (see below), whose sum is σ = 1652686560. Its totient is φ = 138807808.

The previous prime is 520530239. The next prime is 520530247. The reversal of 520530240 is 42035025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520530247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270150 + ... + 272069.

It is an arithmetic number, because the mean of its divisors is an integer number (29512260).

Almost surely, 2^520530240 is an apocalyptic number.

It is an amenable number.

520530240 is an abundant number, since it is smaller than the sum of its proper divisors (1132156320).

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

520530240 is a wasteful number, since it uses less digits than its factorization.

520530240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542239 (or 542229 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 520530240 is about 22815.1318207895. The cubic root of 520530240 is about 804.4183857425.

Adding to 520530240 its reverse (42035025), we get a palindrome (562565265).

The spelling of 520530240 in words is "five hundred twenty million, five hundred thirty thousand, two hundred forty".