22788138272 has 24 divisors (see below), whose sum is σ = 45907502256. Its totient is φ = 11129090112.

The previous prime is 22788138271. The next prime is 22788138277. The reversal of 22788138272 is 27283188722.

It is a super-2 number, since 2×22788138272² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22788138272.

It is not an unprimeable number, because it can be changed into a prime (22788138271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8279198 + ... + 8281949.

It is an arithmetic number, because the mean of its divisors is an integer number (1912812594).

Almost surely, 2^22788138272 is an apocalyptic number.

It is an amenable number.

22788138272 is an abundant number, since it is smaller than the sum of its proper divisors (23119363984).

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

22788138272 is a wasteful number, since it uses less digits than its factorization.

22788138272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16561200 (or 16561192 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 50.

The spelling of 22788138272 in words is "twenty-two billion, seven hundred eighty-eight million, one hundred thirty-eight thousand, two hundred seventy-two".