520918 has 8 divisors (see below), whose sum is σ = 786240. Its totient is φ = 258840.

The previous prime is 520913. The next prime is 520921. The reversal of 520918 is 819025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 520892 and 520901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520913) by changing a digit.

520918 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 3 ways as a sum of consecutive naturals, for example, 358 + ... + 1081.

It is an arithmetic number, because the mean of its divisors is an integer number (98280).

2⁵²⁰⁹¹⁸ is an apocalyptic number.

520918 is a deficient number, since it is larger than the sum of its proper divisors (265322).

520918 is a wasteful number, since it uses less digits than its factorization.

520918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 520918 is about 721.7464928907. The cubic root of 520918 is about 80.4618082019.

The spelling of 520918 in words is "five hundred twenty thousand, nine hundred eighteen".