28086005 has 8 divisors (see below), whose sum is σ = 33734232. Its totient is φ = 22448128.

The previous prime is 28085987. The next prime is 28086017. The reversal of 28086005 is 50068082.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1943236 + 26142769 = 1394^2 + 5113^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28086005 - 2⁸ = 28085749 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 5957 + ... + 9573.

It is an arithmetic number, because the mean of its divisors is an integer number (4216779).

Almost surely, 2^28086005 is an apocalyptic number.

It is an amenable number.

28086005 is a deficient number, since it is larger than the sum of its proper divisors (5648227).

28086005 is a wasteful number, since it uses less digits than its factorization.

28086005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5175.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 28086005 is about 5299.6230998062. The cubic root of 28086005 is about 303.9694863475.

The spelling of 28086005 in words is "twenty-eight million, eighty-six thousand, five".