28008860 has 48 divisors (see below), whose sum is σ = 67949280. Its totient is φ = 9584640.

The previous prime is 28008853. The next prime is 28008887. The reversal of 28008860 is 6880082.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 5 + ... + 7484.

It is an arithmetic number, because the mean of its divisors is an integer number (1415610).

Almost surely, 2^28008860 is an apocalyptic number.

28008860 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 28008860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33974640).

28008860 is an abundant number, since it is smaller than the sum of its proper divisors (39940420).

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

28008860 is a wasteful number, since it uses less digits than its factorization.

28008860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7526 (or 7524 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 28008860 is about 5292.3397472196. The cubic root of 28008860 is about 303.6909225936.

The spelling of 28008860 in words is "twenty-eight million, eight thousand, eight hundred sixty".