28881210 has 32 divisors (see below), whose sum is σ = 69636672. Its totient is φ = 7665920.

The previous prime is 28881163. The next prime is 28881227. The reversal of 28881210 is 1218882.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 4690 + ... + 8930.

It is an arithmetic number, because the mean of its divisors is an integer number (2176146).

Almost surely, 2^28881210 is an apocalyptic number.

28881210 is an abundant number, since it is smaller than the sum of its proper divisors (40755462).

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

28881210 is a wasteful number, since it uses less digits than its factorization.

28881210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4478.

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 28881210 is about 5374.1241146814. The cubic root of 28881210 is about 306.8116136367.

The spelling of 28881210 in words is "twenty-eight million, eight hundred eighty-one thousand, two hundred ten".