518540040 has 96 divisors (see below), whose sum is σ = 1696593600. Its totient is φ = 137347200.

The previous prime is 518540021. The next prime is 518540047. The reversal of 518540040 is 40045815.

It is a junction number, because it is equal to n+sod(n) for n = 518539986 and 518540013.

It is not an unprimeable number, because it can be changed into a prime (518540047) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 49591 + ... + 59129.

It is an arithmetic number, because the mean of its divisors is an integer number (17672850).

Almost surely, 2^518540040 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 518540040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848296800).

518540040 is an abundant number, since it is smaller than the sum of its proper divisors (1178053560).

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

518540040 is a wasteful number, since it uses less digits than its factorization.

518540040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9707 (or 9700 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 518540040 is about 22771.4742605743. The cubic root of 518540040 is about 803.3918695353.

Adding to 518540040 its reverse (40045815), we get a palindrome (558585855).

The spelling of 518540040 in words is "five hundred eighteen million, five hundred forty thousand, forty".