520040000 has 70 divisors (see below), whose sum is σ = 1289629374. Its totient is φ = 208000000.

The previous prime is 520039987. The next prime is 520040039. The reversal of 520040000 is 40025.

It can be written as a sum of positive squares in 5 ways, for example, as 374499904 + 145540096 = 19352^2 + 12064^2 .

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 9 ways as a sum of consecutive naturals, for example, 33500 + ... + 46500.

Almost surely, 2^520040000 is an apocalyptic number.

520040000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (644814687).

520040000 is an abundant number, since it is smaller than the sum of its proper divisors (769589374).

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

520040000 is an equidigital number, since it uses as much as digits as its factorization.

520040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13033 (or 13008 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 520040000 is about 22804.3855431362. The cubic root of 520040000 is about 804.1657702956.

Adding to 520040000 its reverse (40025), we get a palindrome (520080025).

The spelling of 520040000 in words is "five hundred twenty million, forty thousand".