520730 has 32 divisors (see below), whose sum is σ = 1102464. Its totient is φ = 173376.

The previous prime is 520721. The next prime is 520747. The reversal of 520730 is 37025.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 520699 and 520708.

It is a congruent number.

It is an unprimeable 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 15 ways as a sum of consecutive naturals, for example, 2924 + ... + 3096.

It is an arithmetic number, because the mean of its divisors is an integer number (34452).

2⁵²⁰⁷³⁰ is an apocalyptic number.

520730 is an abundant number, since it is smaller than the sum of its proper divisors (581734).

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

520730 is a wasteful number, since it uses less digits than its factorization.

520730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230.

The product of its (nonzero) digits is 210, while the sum is 17.

The square root of 520730 is about 721.6162415024. The cubic root of 520730 is about 80.4521274459.

Adding to 520730 its reverse (37025), we get a palindrome (557755).

The spelling of 520730 in words is "five hundred twenty thousand, seven hundred thirty".