518840 has 64 divisors (see below), whose sum is σ = 1425600. Its totient is φ = 165888.

The previous prime is 518831. The next prime is 518863. The reversal of 518840 is 48815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4706 + ... + 4814.

It is an arithmetic number, because the mean of its divisors is an integer number (22275).

2⁵¹⁸⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 518840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712800).

518840 is an abundant number, since it is smaller than the sum of its proper divisors (906760).

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

518840 is a wasteful number, since it uses less digits than its factorization.

518840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 518840 is about 720.3054907468. The cubic root of 518840 is about 80.3546752446.

The spelling of 518840 in words is "five hundred eighteen thousand, eight hundred forty".