520420000 has 60 divisors (see below), whose sum is σ = 1280360466. Its totient is φ = 208160000.

The previous prime is 520419983. The next prime is 520420027. The reversal of 520420000 is 24025.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 94245264 + 426174736 = 9708^2 + 20644^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6990 + ... + 33010.

Almost surely, 2^520420000 is an apocalyptic number.

520420000 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 520420000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (640180233).

520420000 is an abundant number, since it is smaller than the sum of its proper divisors (759940466).

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

520420000 is an equidigital number, since it uses as much as digits as its factorization.

520420000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26051 (or 26028 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 520420000 is about 22812.7157524044. The cubic root of 520420000 is about 804.3615940731.

Adding to 520420000 its reverse (24025), we get a palindrome (520444025).

The spelling of 520420000 in words is "five hundred twenty million, four hundred twenty thousand".