218873828 has 6 divisors (see below), whose sum is σ = 383029206. Its totient is φ = 109436912.

The previous prime is 218873821. The next prime is 218873869. The reversal of 218873828 is 828378812.

218873828 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 131974144 + 86899684 = 11488^2 + 9322^2 .

It is not an unprimeable number, because it can be changed into a prime (218873821) 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 as a sum of consecutive naturals, namely, 27359225 + ... + 27359232.

It is an arithmetic number, because the mean of its divisors is an integer number (63838201).

Almost surely, 2^218873828 is an apocalyptic number.

It is an amenable number.

218873828 is a deficient number, since it is larger than the sum of its proper divisors (164155378).

218873828 is a wasteful number, since it uses less digits than its factorization.

218873828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54718461 (or 54718459 counting only the distinct ones).

The product of its digits is 344064, while the sum is 47.

The square root of 218873828 is about 14794.3850159444. The cubic root of 218873828 is about 602.6492372060.

The spelling of 218873828 in words is "two hundred eighteen million, eight hundred seventy-three thousand, eight hundred twenty-eight".