28088005 has 8 divisors (see below), whose sum is σ = 36769824. Its totient is φ = 20427600.

The previous prime is 28088003. The next prime is 28088009. The reversal of 28088005 is 50088082.

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

It is not a de Polignac number, because 28088005 - 2¹ = 28088003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28088003) 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, 255291 + ... + 255400.

It is an arithmetic number, because the mean of its divisors is an integer number (4596228).

Almost surely, 2^28088005 is an apocalyptic number.

It is an amenable number.

28088005 is a deficient number, since it is larger than the sum of its proper divisors (8681819).

28088005 is a wasteful number, since it uses less digits than its factorization.

28088005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510707.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 28088005 is about 5299.8117891110. The cubic root of 28088005 is about 303.9767013827.

The spelling of 28088005 in words is "twenty-eight million, eighty-eight thousand, five".