28689570168 has 288 divisors, whose sum is σ = 88238626560. Its totient is φ = 7749329280.

The previous prime is 28689570157. The next prime is 28689570187. The reversal of 28689570168 is 86107598682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 66564913 + ... + 66565343.

It is an arithmetic number, because the mean of its divisors is an integer number (306384120).

Almost surely, 2^28689570168 is an apocalyptic number.

28689570168 is a gapful number since it is divisible by the number (28) 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 28689570168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44119313280).

28689570168 is an abundant number, since it is smaller than the sum of its proper divisors (59549056392).

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

28689570168 is a wasteful number, since it uses less digits than its factorization.

28689570168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 60.

The spelling of 28689570168 in words is "twenty-eight billion, six hundred eighty-nine million, five hundred seventy thousand, one hundred sixty-eight".