518020 has 24 divisors (see below), whose sum is σ = 1108800. Its totient is φ = 203232.

The previous prime is 518017. The next prime is 518047. The reversal of 518020 is 20815.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 517985 and 518003.

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 7 ways as a sum of consecutive naturals, for example, 961 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (46200).

2⁵¹⁸⁰²⁰ is an apocalyptic number.

It is an amenable number.

518020 is an abundant number, since it is smaller than the sum of its proper divisors (590780).

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

518020 is a wasteful number, since it uses less digits than its factorization.

518020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 518020 is about 719.7360627341. The cubic root of 518020 is about 80.3123207766.

Adding to 518020 its reverse (20815), we get a palindrome (538835).

It can be divided in two parts, 5 and 18020, that multiplied together give a triangular number (90100 = T₄₂₄).

The spelling of 518020 in words is "five hundred eighteen thousand, twenty".