28280779748 has 72 divisors (see below), whose sum is σ = 56568960000. Its totient is φ = 12331253376.

The previous prime is 28280779741. The next prime is 28280779799. The reversal of 28280779748 is 84797708282.

It is not an unprimeable number, because it can be changed into a prime (28280779741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4916378 + ... + 4922126.

It is an arithmetic number, because the mean of its divisors is an integer number (785680000).

Almost surely, 2^28280779748 is an apocalyptic number.

It is an amenable number.

28280779748 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

28280779748 is a wasteful number, since it uses less digits than its factorization.

28280779748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6181 (or 6166 counting only the distinct ones).

The product of its (nonzero) digits is 25288704, while the sum is 62.

The spelling of 28280779748 in words is "twenty-eight billion, two hundred eighty million, seven hundred seventy-nine thousand, seven hundred forty-eight".