28223066540 has 24 divisors (see below), whose sum is σ = 60272992080. Its totient is φ = 11097883328.

The previous prime is 28223066489. The next prime is 28223066561. The reversal of 28223066540 is 4566032282.

It is a junction number, because it is equal to n+sod(n) for n = 28223066494 and 28223066503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11957747 + ... + 11960106.

It is an arithmetic number, because the mean of its divisors is an integer number (2511374670).

Almost surely, 2^28223066540 is an apocalyptic number.

28223066540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28223066540 is an abundant number, since it is smaller than the sum of its proper divisors (32049925540).

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

28223066540 is a wasteful number, since it uses less digits than its factorization.

28223066540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23917921 (or 23917919 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 28223066540 in words is "twenty-eight billion, two hundred twenty-three million, sixty-six thousand, five hundred forty".