28220745848 has 16 divisors (see below), whose sum is σ = 53508438000. Its totient is φ = 13951829056.

The previous prime is 28220745829. The next prime is 28220745913. The reversal of 28220745848 is 84854702282.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28220745796 and 28220745805.

It is a congruent number.

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, 19817228 + ... + 19818651.

It is an arithmetic number, because the mean of its divisors is an integer number (3344277375).

Almost surely, 2^28220745848 is an apocalyptic number.

It is an amenable number.

28220745848 is a deficient number, since it is larger than the sum of its proper divisors (25287692152).

28220745848 is a wasteful number, since it uses less digits than its factorization.

28220745848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39635974 (or 39635970 counting only the distinct ones).

The product of its (nonzero) digits is 2293760, while the sum is 50.

The spelling of 28220745848 in words is "twenty-eight billion, two hundred twenty million, seven hundred forty-five thousand, eight hundred forty-eight".