28708135 has 8 divisors (see below), whose sum is σ = 34657056. Its totient is φ = 22828320.

The previous prime is 28708111. The next prime is 28708181. The reversal of 28708135 is 53180782.

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

It is not a de Polignac number, because 28708135 - 2⁷ = 28708007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28708135.

It is a congruent number.

It is an unprimeable number.

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, 16356 + ... + 18025.

It is an arithmetic number, because the mean of its divisors is an integer number (4332132).

Almost surely, 2^28708135 is an apocalyptic number.

28708135 is a deficient number, since it is larger than the sum of its proper divisors (5948921).

28708135 is a wasteful number, since it uses less digits than its factorization.

28708135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34553.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 28708135 is about 5357.9972937656. The cubic root of 28708135 is about 306.1975137041.

The spelling of 28708135 in words is "twenty-eight million, seven hundred eight thousand, one hundred thirty-five".