218856238 has 8 divisors (see below), whose sum is σ = 328347288. Its totient is φ = 109407144.

The previous prime is 218856233. The next prime is 218856241. The reversal of 218856238 is 832658812.

218856238 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 218856194 and 218856203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218856233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13845 + ... + 25087.

It is an arithmetic number, because the mean of its divisors is an integer number (41043411).

Almost surely, 2^218856238 is an apocalyptic number.

218856238 is a deficient number, since it is larger than the sum of its proper divisors (109491050).

218856238 is a wasteful number, since it uses less digits than its factorization.

218856238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20978.

The product of its digits is 184320, while the sum is 43.

The square root of 218856238 is about 14793.7905217020. The cubic root of 218856238 is about 602.6330926168.

The spelling of 218856238 in words is "two hundred eighteen million, eight hundred fifty-six thousand, two hundred thirty-eight".