28086210 has 128 divisors (see below), whose sum is σ = 82425600. Its totient is φ = 6773760.

The previous prime is 28086209. The next prime is 28086221. The reversal of 28086210 is 1268082.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 63 ways as a sum of consecutive naturals, for example, 133005 + ... + 133215.

It is an arithmetic number, because the mean of its divisors is an integer number (643950).

Almost surely, 2^28086210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28086210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41212800).

28086210 is an abundant number, since it is smaller than the sum of its proper divisors (54339390).

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

28086210 is a wasteful number, since it uses less digits than its factorization.

28086210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 28086210 is about 5299.6424407690. The cubic root of 28086210 is about 303.9702259044.

The spelling of 28086210 in words is "twenty-eight million, eighty-six thousand, two hundred ten".