538381218 has 8 divisors (see below), whose sum is σ = 1076762448. Its totient is φ = 179460404.

The previous prime is 538381187. The next prime is 538381219. The reversal of 538381218 is 812183835.

It is a sphenic number, since it is the product of 3 distinct primes.

538381218 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (538381219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44865096 + ... + 44865107.

It is an arithmetic number, because the mean of its divisors is an integer number (134595306).

Almost surely, 2^538381218 is an apocalyptic number.

538381218 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.

538381218 is a wasteful number, since it uses less digits than its factorization.

538381218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89730208.

The product of its digits is 46080, while the sum is 39.

The square root of 538381218 is about 23203.0432917753. The cubic root of 538381218 is about 813.5107574874.

The spelling of 538381218 in words is "five hundred thirty-eight million, three hundred eighty-one thousand, two hundred eighteen".