218338870 has 8 divisors (see below), whose sum is σ = 393009984. Its totient is φ = 87335544.

The previous prime is 218338867. The next prime is 218338909. The reversal of 218338870 is 78833812.

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

It is a congruent 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, 10916934 + ... + 10916953.

It is an arithmetic number, because the mean of its divisors is an integer number (49126248).

Almost surely, 2^218338870 is an apocalyptic number.

218338870 is a deficient number, since it is larger than the sum of its proper divisors (174671114).

218338870 is a wasteful number, since it uses less digits than its factorization.

218338870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21833894.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 218338870 is about 14776.2941903577. The cubic root of 218338870 is about 602.1578505354.

It can be divided in two parts, 21833 and 8870, that added together give a palindrome (30703).

The spelling of 218338870 in words is "two hundred eighteen million, three hundred thirty-eight thousand, eight hundred seventy".