520580840 has 96 divisors (see below), whose sum is σ = 1293158520. Its totient is φ = 188457984.

The previous prime is 520580779. The next prime is 520580869. The reversal of 520580840 is 48085025.

It can be written as a sum of positive squares in 12 ways, for example, as 64416676 + 456164164 = 8026^2 + 21358^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 520580797 and 520580806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 357554 + ... + 359006.

Almost surely, 2^520580840 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 520580840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646579260).

520580840 is an abundant number, since it is smaller than the sum of its proper divisors (772577680).

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

520580840 is a wasteful number, since it uses less digits than its factorization.

520580840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543 (or 1526 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 520580840 is about 22816.2407070052. The cubic root of 520580840 is about 804.4444503514. Note that the first 4 decimals are identical.

The spelling of 520580840 in words is "five hundred twenty million, five hundred eighty thousand, eight hundred forty".