28938845712 has 240 divisors, whose sum is σ = 91015936512. Its totient is φ = 7890462720.

The previous prime is 28938845711. The next prime is 28938845773. The reversal of 28938845712 is 21754883982.

It is a super-2 number, since 2×28938845712² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28938845711) 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 47 ways as a sum of consecutive naturals, for example, 5319858 + ... + 5325294.

Almost surely, 2^28938845712 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 28938845712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45507968256).

28938845712 is an abundant number, since it is smaller than the sum of its proper divisors (62077090800).

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

28938845712 is a wasteful number, since it uses less digits than its factorization.

28938845712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566 (or 5553 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 57.

The spelling of 28938845712 in words is "twenty-eight billion, nine hundred thirty-eight million, eight hundred forty-five thousand, seven hundred twelve".