28911848672 has 96 divisors (see below), whose sum is σ = 67221504000. Its totient is φ = 12233579904.

The previous prime is 28911848663. The next prime is 28911848717. The reversal of 28911848672 is 27684811982.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 850433 + ... + 883775.

It is an arithmetic number, because the mean of its divisors is an integer number (700224000).

Almost surely, 2^28911848672 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 28911848672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33610752000).

28911848672 is an abundant number, since it is smaller than the sum of its proper divisors (38309655328).

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

28911848672 is an equidigital number, since it uses as much as digits as its factorization.

28911848672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33453 (or 33431 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 56.

The spelling of 28911848672 in words is "twenty-eight billion, nine hundred eleven million, eight hundred forty-eight thousand, six hundred seventy-two".