28489771008 has 576 divisors, whose sum is σ = 94443148800. Its totient is φ = 8539914240.

The previous prime is 28489770979. The next prime is 28489771039. The reversal of 28489771008 is 80017798482.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217479103 + ... + 217479233.

It is an arithmetic number, because the mean of its divisors is an integer number (163963800).

Almost surely, 2^28489771008 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 28489771008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47221574400).

28489771008 is an abundant number, since it is smaller than the sum of its proper divisors (65953377792).

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

28489771008 is a wasteful number, since it uses less digits than its factorization.

28489771008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 28489771008 in words is "twenty-eight billion, four hundred eighty-nine million, seven hundred seventy-one thousand, eight".