28489327776 has 864 divisors, whose sum is σ = 110117629440. Its totient is φ = 7074542592.

The previous prime is 28489327751. The next prime is 28489327793. The reversal of 28489327776 is 67772398482.

28489327776 is a `hidden beast` number, since 284 + 89 + 3 + 277 + 7 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 174781071 + ... + 174781233.

It is an arithmetic number, because the mean of its divisors is an integer number (127450960).

Almost surely, 2^28489327776 is an apocalyptic number.

28489327776 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28489327776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55058814720).

28489327776 is an abundant number, since it is smaller than the sum of its proper divisors (81628301664).

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

28489327776 is a wasteful number, since it uses less digits than its factorization.

28489327776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 207 counting only the distinct ones).

The product of its digits is 56899584, while the sum is 63.

The spelling of 28489327776 in words is "twenty-eight billion, four hundred eighty-nine million, three hundred twenty-seven thousand, seven hundred seventy-six".