518974218 has 48 divisors (see below), whose sum is σ = 1290047616. Its totient is φ = 147705120.

The previous prime is 518974201. The next prime is 518974229. The reversal of 518974218 is 812479815.

518974218 is a `hidden beast` number, since 518 + 97 + 42 + 1 + 8 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25308 + ... + 40968.

It is an arithmetic number, because the mean of its divisors is an integer number (26875992).

Almost surely, 2^518974218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 518974218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645023808).

518974218 is an abundant number, since it is smaller than the sum of its proper divisors (771073398).

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

518974218 is a wasteful number, since it uses less digits than its factorization.

518974218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15939 (or 15936 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 518974218 is about 22781.0056406648. The cubic root of 518974218 is about 803.6160359373.

The spelling of 518974218 in words is "five hundred eighteen million, nine hundred seventy-four thousand, two hundred eighteen".