520630 has 16 divisors (see below), whose sum is σ = 1022544. Its totient is φ = 189280.

The previous prime is 520621. The next prime is 520631. The reversal of 520630 is 36025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520631) by changing a digit.

520630 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2257 + ... + 2476.

It is an arithmetic number, because the mean of its divisors is an integer number (63909).

2⁵²⁰⁶³⁰ is an apocalyptic number.

520630 is a deficient number, since it is larger than the sum of its proper divisors (501914).

520630 is a wasteful number, since it uses less digits than its factorization.

520630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 520630 is about 721.5469492694. The cubic root of 520630 is about 80.4469771583.

Adding to 520630 its reverse (36025), we get a palindrome (556655).

The spelling of 520630 in words is "five hundred twenty thousand, six hundred thirty".