518620172 has 12 divisors (see below), whose sum is σ = 1037240400. Its totient is φ = 222265776.

The previous prime is 518620163. The next prime is 518620229. The reversal of 518620172 is 271026815.

518620172 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9261047 + ... + 9261102.

It is an arithmetic number, because the mean of its divisors is an integer number (86436700).

Almost surely, 2^518620172 is an apocalyptic number.

It is an amenable number.

518620172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

518620172 is a wasteful number, since it uses less digits than its factorization.

518620172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18522160 (or 18522158 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 518620172 is about 22773.2336746453. The cubic root of 518620172 is about 803.4332511558.

Adding to 518620172 its reverse (271026815), we get a palindrome (789646987).

The spelling of 518620172 in words is "five hundred eighteen million, six hundred twenty thousand, one hundred seventy-two".