218728034 has 16 divisors (see below), whose sum is σ = 387892800. Its totient is φ = 90507984.

The previous prime is 218728007. The next prime is 218728049. The reversal of 218728034 is 430827812.

218728034 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 = 218727985 and 218728003.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 268964 + ... + 269775.

It is an arithmetic number, because the mean of its divisors is an integer number (24243300).

Almost surely, 2^218728034 is an apocalyptic number.

218728034 is a deficient number, since it is larger than the sum of its proper divisors (169164766).

218728034 is a wasteful number, since it uses less digits than its factorization.

218728034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538777.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 218728034 is about 14789.4568527718. The cubic root of 218728034 is about 602.5153972982.

The spelling of 218728034 in words is "two hundred eighteen million, seven hundred twenty-eight thousand, thirty-four".