216718698 has 16 divisors (see below), whose sum is σ = 495357120. Its totient is φ = 61919616.

The previous prime is 216718687. The next prime is 216718699. The reversal of 216718698 is 896817612.

It is not an unprimeable number, because it can be changed into a prime (216718699) 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, 2579943 + ... + 2580026.

It is an arithmetic number, because the mean of its divisors is an integer number (30959820).

Almost surely, 2^216718698 is an apocalyptic number.

216718698 is an abundant number, since it is smaller than the sum of its proper divisors (278638422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216718698 is a wasteful number, since it uses less digits than its factorization.

216718698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159981.

The product of its digits is 290304, while the sum is 48.

The square root of 216718698 is about 14721.3687542973. The cubic root of 216718698 is about 600.6647244083.

The spelling of 216718698 in words is "two hundred sixteen million, seven hundred eighteen thousand, six hundred ninety-eight".