218704422 has 16 divisors (see below), whose sum is σ = 463138992. Its totient is φ = 68613120.

The previous prime is 218704391. The next prime is 218704427. The reversal of 218704422 is 224407812.

It is a self number, because there is not a number n which added to its sum of digits gives 218704422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218704427) 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 7 ways as a sum of consecutive naturals, for example, 1071979 + ... + 1072182.

It is an arithmetic number, because the mean of its divisors is an integer number (28946187).

Almost surely, 2^218704422 is an apocalyptic number.

218704422 is an abundant number, since it is smaller than the sum of its proper divisors (244434570).

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

218704422 is a wasteful number, since it uses less digits than its factorization.

218704422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144183.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 218704422 is about 14788.6585598559. The cubic root of 218704422 is about 602.4937157222.

The spelling of 218704422 in words is "two hundred eighteen million, seven hundred four thousand, four hundred twenty-two".