28508026880 has 192 divisors, whose sum is σ = 69912460800. Its totient is φ = 11155046400.

The previous prime is 28508026843. The next prime is 28508026907. The reversal of 28508026880 is 8862080582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159262631 + ... + 159262809.

It is an arithmetic number, because the mean of its divisors is an integer number (364127400).

Almost surely, 2^28508026880 is an apocalyptic number.

28508026880 is a gapful number since it is divisible by the number (20) 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 28508026880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34956230400).

28508026880 is an abundant number, since it is smaller than the sum of its proper divisors (41404433920).

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

28508026880 is a wasteful number, since it uses less digits than its factorization.

28508026880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 47.

The spelling of 28508026880 in words is "twenty-eight billion, five hundred eight million, twenty-six thousand, eight hundred eighty".