518322240 has 140 divisors (see below), whose sum is σ = 1843855596. Its totient is φ = 138212352.

The previous prime is 518322229. The next prime is 518322269. The reversal of 518322240 is 42223815.

It can be written as a sum of positive squares in 2 ways, for example, as 329204736 + 189117504 = 18144^2 + 13752^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15922 + ... + 35918.

Almost surely, 2^518322240 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 518322240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921927798).

518322240 is an abundant number, since it is smaller than the sum of its proper divisors (1325533356).

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

518322240 is a wasteful number, since it uses less digits than its factorization.

518322240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20026 (or 20007 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 518322240 is about 22766.6914592349. The cubic root of 518322240 is about 803.2793721131.

The spelling of 518322240 in words is "five hundred eighteen million, three hundred twenty-two thousand, two hundred forty".