28223066388 has 24 divisors (see below), whose sum is σ = 71840532960. Its totient is φ = 8552444320.

The previous prime is 28223066387. The next prime is 28223066419. The reversal of 28223066388 is 88366032282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28223066387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106905423 + ... + 106905686.

It is an arithmetic number, because the mean of its divisors is an integer number (2993355540).

Almost surely, 2^28223066388 is an apocalyptic number.

It is an amenable number.

28223066388 is an abundant number, since it is smaller than the sum of its proper divisors (43617466572).

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

28223066388 is a wasteful number, since it uses less digits than its factorization.

28223066388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213811127 (or 213811125 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 48.

The spelling of 28223066388 in words is "twenty-eight billion, two hundred twenty-three million, sixty-six thousand, three hundred eighty-eight".