518728 has 32 divisors (see below), whose sum is σ = 1137600. Its totient is φ = 217152.

The previous prime is 518717. The next prime is 518729. The reversal of 518728 is 827815.

518728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 518728.

It is not an unprimeable number, because it can be changed into a prime (518729) by changing a digit.

518728 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3226 + ... + 3382.

It is an arithmetic number, because the mean of its divisors is an integer number (35550).

2⁵¹⁸⁷²⁸ 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 518728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568800).

518728 is an abundant number, since it is smaller than the sum of its proper divisors (618872).

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

518728 is a wasteful number, since it uses less digits than its factorization.

518728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 225 counting only the distinct ones).

The product of its digits is 4480, while the sum is 31.

The square root of 518728 is about 720.2277417595. The cubic root of 518728 is about 80.3488928767.

The spelling of 518728 in words is "five hundred eighteen thousand, seven hundred twenty-eight".