28928086 has 16 divisors (see below), whose sum is σ = 47499408. Its totient is φ = 13104000.

The previous prime is 28928069. The next prime is 28928087. The reversal of 28928086 is 68082982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28928087) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4786 + ... + 8986.

It is an arithmetic number, because the mean of its divisors is an integer number (2968713).

Almost surely, 2^28928086 is an apocalyptic number.

28928086 is a deficient number, since it is larger than the sum of its proper divisors (18571322).

28928086 is a wasteful number, since it uses less digits than its factorization.

28928086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 28928086 is about 5378.4836152953. The cubic root of 28928086 is about 306.9775153561.

The spelling of 28928086 in words is "twenty-eight million, nine hundred twenty-eight thousand, eighty-six".