22278878888 has 16 divisors (see below), whose sum is σ = 47740454880. Its totient is φ = 9548090928.

The previous prime is 22278878863. The next prime is 22278878899. The reversal of 22278878888 is 88887887222.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198918506 + ... + 198918617.

It is an arithmetic number, because the mean of its divisors is an integer number (2983778430).

Almost surely, 2^22278878888 is an apocalyptic number.

22278878888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22278878888 is an abundant number, since it is smaller than the sum of its proper divisors (25461575992).

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

22278878888 is a wasteful number, since it uses less digits than its factorization.

22278878888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397837136 (or 397837132 counting only the distinct ones).

The product of its digits is 102760448, while the sum is 68.

The spelling of 22278878888 in words is "twenty-two billion, two hundred seventy-eight million, eight hundred seventy-eight thousand, eight hundred eighty-eight".