2188538672 has 40 divisors (see below), whose sum is σ = 4356283680. Its totient is φ = 1064491520.

The previous prime is 2188538669. The next prime is 2188538683. The reversal of 2188538672 is 2768358812.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2188538672.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230858 + ... + 240150.

It is an arithmetic number, because the mean of its divisors is an integer number (108907092).

Almost surely, 2^2188538672 is an apocalyptic number.

It is an amenable number.

2188538672 is a deficient number, since it is larger than the sum of its proper divisors (2167745008).

2188538672 is a wasteful number, since it uses less digits than its factorization.

2188538672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9701 (or 9695 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 50.

The square root of 2188538672 is about 46781.8198876444. The cubic root of 2188538672 is about 1298.3289519329.

It can be divided in two parts, 218853867 and 2, that multiplied together give a palindrome (437707734).

The spelling of 2188538672 in words is "two billion, one hundred eighty-eight million, five hundred thirty-eight thousand, six hundred seventy-two".