28028586 has 16 divisors (see below), whose sum is σ = 56196000. Its totient is φ = 9319728.

The previous prime is 28028549. The next prime is 28028593. The reversal of 28028586 is 68582082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3061 + ... + 8088.

It is an arithmetic number, because the mean of its divisors is an integer number (3512250).

Almost surely, 2^28028586 is an apocalyptic number.

28028586 is an abundant number, since it is smaller than the sum of its proper divisors (28167414).

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

28028586 is a wasteful number, since it uses less digits than its factorization.

28028586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11573.

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 28028586 is about 5294.2030561738. The cubic root of 28028586 is about 303.7622000553.

The spelling of 28028586 in words is "twenty-eight million, twenty-eight thousand, five hundred eighty-six".