218918058 has 8 divisors (see below), whose sum is σ = 437836128. Its totient is φ = 72972684.

The previous prime is 218918053. The next prime is 218918059. The reversal of 218918058 is 850819812.

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

218918058 is an admirable number.

It is a super-3 number, since 3×218918058³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (218918053) 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 3 ways as a sum of consecutive naturals, for example, 18243166 + ... + 18243177.

It is an arithmetic number, because the mean of its divisors is an integer number (54729516).

Almost surely, 2^218918058 is an apocalyptic number.

218918058 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.

218918058 is a wasteful number, since it uses less digits than its factorization.

218918058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36486348.

The product of its (nonzero) digits is 46080, while the sum is 42.

The square root of 218918058 is about 14795.8797643128. The cubic root of 218918058 is about 602.6898289032.

The spelling of 218918058 in words is "two hundred eighteen million, nine hundred eighteen thousand, fifty-eight".