22279987880 has 32 divisors (see below), whose sum is σ = 50466429000. Its totient is φ = 8852180736.

The previous prime is 22279987859. The next prime is 22279987901. The reversal of 22279987880 is 8878997222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22279987859) and next prime (22279987901).

It can be written as a sum of positive squares in 4 ways, for example, as 20197525924 + 2082461956 = 142118^2 + 45634^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1863167 + ... + 1875086.

Almost surely, 2^22279987880 is an apocalyptic number.

22279987880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22279987880 is an abundant number, since it is smaller than the sum of its proper divisors (28186441120).

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

22279987880 is a wasteful number, since it uses less digits than its factorization.

22279987880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738413 (or 3738409 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 62.

The spelling of 22279987880 in words is "twenty-two billion, two hundred seventy-nine million, nine hundred eighty-seven thousand, eight hundred eighty".