2218642788 has 48 divisors (see below), whose sum is σ = 5246248896. Its totient is φ = 729655680.

The previous prime is 2218642781. The next prime is 2218642793. The reversal of 2218642788 is 8872468122.

It is not an unprimeable number, because it can be changed into a prime (2218642781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1374670 + ... + 1376282.

It is an arithmetic number, because the mean of its divisors is an integer number (109296852).

Almost surely, 2^2218642788 is an apocalyptic number.

It is an amenable number.

2218642788 is an abundant number, since it is smaller than the sum of its proper divisors (3027606108).

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

2218642788 is a wasteful number, since it uses less digits than its factorization.

2218642788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084 (or 3082 counting only the distinct ones).

The product of its digits is 688128, while the sum is 48.

The square root of 2218642788 is about 47102.4711453656. The cubic root of 2218642788 is about 1304.2548533022.

The spelling of 2218642788 in words is "two billion, two hundred eighteen million, six hundred forty-two thousand, seven hundred eighty-eight".