28289852860 has 48 divisors (see below), whose sum is σ = 59567852736. Its totient is φ = 11285678592.

The previous prime is 28289852821. The next prime is 28289852867. The reversal of 28289852860 is 6825898282.

It is a junction number, because it is equal to n+sod(n) for n = 28289852795 and 28289852804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28289852867) by changing a digit.

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, 23321614 + ... + 23322826.

It is an arithmetic number, because the mean of its divisors is an integer number (1240996932).

Almost surely, 2^28289852860 is an apocalyptic number.

28289852860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28289852860 is an abundant number, since it is smaller than the sum of its proper divisors (31277999876).

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

28289852860 is a wasteful number, since it uses less digits than its factorization.

28289852860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382 (or 3380 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 58.

The spelling of 28289852860 in words is "twenty-eight billion, two hundred eighty-nine million, eight hundred fifty-two thousand, eight hundred sixty".