218878992 has 120 divisors (see below), whose sum is σ = 634521888. Its totient is φ = 70387200.

The previous prime is 218878973. The next prime is 218878999. The reversal of 218878992 is 299878812.

218878992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (218878999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 773283 + ... + 773565.

Almost surely, 2^218878992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218878992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317260944).

218878992 is an abundant number, since it is smaller than the sum of its proper divisors (415642896).

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

218878992 is a wasteful number, since it uses less digits than its factorization.

218878992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 460 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 218878992 is about 14794.5595405879. The cubic root of 218878992 is about 602.6539767039.

The spelling of 218878992 in words is "two hundred eighteen million, eight hundred seventy-eight thousand, nine hundred ninety-two".