28228586 has 8 divisors (see below), whose sum is σ = 42379200. Its totient is φ = 14102188.

The previous prime is 28228573. The next prime is 28228621. The reversal of 28228586 is 68582282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2786 + ... + 8013.

It is an arithmetic number, because the mean of its divisors is an integer number (5297400).

Almost surely, 2^28228586 is an apocalyptic number.

28228586 is a deficient number, since it is larger than the sum of its proper divisors (14150614).

28228586 is a wasteful number, since it uses less digits than its factorization.

28228586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12108.

The product of its digits is 122880, while the sum is 41.

The square root of 28228586 is about 5313.0580648060. The cubic root of 28228586 is about 304.4829940451.

The spelling of 28228586 in words is "twenty-eight million, two hundred twenty-eight thousand, five hundred eighty-six".