218982844 has 12 divisors (see below), whose sum is σ = 384308064. Its totient is φ = 109180544.

The previous prime is 218982821. The next prime is 218982851. The reversal of 218982844 is 448289812.

218982844 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 218982794 and 218982803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76132 + ... + 78955.

It is an arithmetic number, because the mean of its divisors is an integer number (32025672).

Almost surely, 2^218982844 is an apocalyptic number.

It is an amenable number.

218982844 is a deficient number, since it is larger than the sum of its proper divisors (165325220).

218982844 is a wasteful number, since it uses less digits than its factorization.

218982844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155444 (or 155442 counting only the distinct ones).

The product of its digits is 294912, while the sum is 46.

The square root of 218982844 is about 14798.0689280730. The cubic root of 218982844 is about 602.7492758222.

It can be divided in two parts, 21898 and 2844, that added together give a palindrome (24742).

The spelling of 218982844 in words is "two hundred eighteen million, nine hundred eighty-two thousand, eight hundred forty-four".