520900 has 18 divisors (see below), whose sum is σ = 1130570. Its totient is φ = 208320.

The previous prime is 520889. The next prime is 520913. The reversal of 520900 is 9025.

It can be written as a sum of positive squares in 3 ways, for example, as 153664 + 367236 = 392^2 + 606^2 .

It is an unprimeable number.

520900 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2505 + ... + 2704.

2⁵²⁰⁹⁰⁰ is an apocalyptic number.

520900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

520900 is an abundant number, since it is smaller than the sum of its proper divisors (609670).

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

520900 is a wasteful number, since it uses less digits than its factorization.

520900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5223 (or 5216 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 520900 is about 721.7340230306. The cubic root of 520900 is about 80.4608814218.

Adding to 520900 its reverse (9025), we get a palindrome (529925).

The spelling of 520900 in words is "five hundred twenty thousand, nine hundred".