218868670 has 16 divisors (see below), whose sum is σ = 396167760. Its totient is φ = 87057664.

The previous prime is 218868623. The next prime is 218868677. The reversal of 218868670 is 76868812.

It is a self number, because there is not a number n which added to its sum of digits gives 218868670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218868677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59347 + ... + 62926.

It is an arithmetic number, because the mean of its divisors is an integer number (24760485).

Almost surely, 2^218868670 is an apocalyptic number.

218868670 is a deficient number, since it is larger than the sum of its proper divisors (177299090).

218868670 is a wasteful number, since it uses less digits than its factorization.

218868670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122459.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 218868670 is about 14794.2106920241. The cubic root of 218868670 is about 602.6445031404.

The spelling of 218868670 in words is "two hundred eighteen million, eight hundred sixty-eight thousand, six hundred seventy".