22278944844 has 216 divisors, whose sum is σ = 62519092272. Its totient is φ = 6684387840.

The previous prime is 22278944819. The next prime is 22278944861. The reversal of 22278944844 is 44844987222.

22278944844 is a `hidden beast` number, since 2 + 2 + 2 + 78 + 94 + 484 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 64204279 + ... + 64204625.

It is an arithmetic number, because the mean of its divisors is an integer number (289440242).

Almost surely, 2^22278944844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22278944844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31259546136).

22278944844 is an abundant number, since it is smaller than the sum of its proper divisors (40240147428).

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

22278944844 is a wasteful number, since it uses less digits than its factorization.

22278944844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617 (or 599 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 54.

The spelling of 22278944844 in words is "twenty-two billion, two hundred seventy-eight million, nine hundred forty-four thousand, eight hundred forty-four".