22712778788 has 48 divisors (see below), whose sum is σ = 46916876160. Its totient is φ = 9419514624.

The previous prime is 22712778779. The next prime is 22712778799. The reversal of 22712778788 is 88787721722.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3503 + ... + 213161.

It is an arithmetic number, because the mean of its divisors is an integer number (977434920).

Almost surely, 2^22712778788 is an apocalyptic number.

22712778788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22712778788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23458438080).

22712778788 is an abundant number, since it is smaller than the sum of its proper divisors (24204097372).

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

22712778788 is a wasteful number, since it uses less digits than its factorization.

22712778788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209796 (or 209794 counting only the distinct ones).

The product of its digits is 9834496, while the sum is 59.

The spelling of 22712778788 in words is "twenty-two billion, seven hundred twelve million, seven hundred seventy-eight thousand, seven hundred eighty-eight".