28008535 has 16 divisors (see below), whose sum is σ = 34618752. Its totient is φ = 21740800.

The previous prime is 28008517. The next prime is 28008551. The reversal of 28008535 is 53580082.

It is not a de Polignac number, because 28008535 - 2⁹ = 28008023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28008497 and 28008506.

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 15 ways as a sum of consecutive naturals, for example, 64770 + ... + 65200.

It is an arithmetic number, because the mean of its divisors is an integer number (2163672).

Almost surely, 2^28008535 is an apocalyptic number.

28008535 is a deficient number, since it is larger than the sum of its proper divisors (6610217).

28008535 is a wasteful number, since it uses less digits than its factorization.

28008535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 28008535 is about 5292.3090423746. The cubic root of 28008535 is about 303.6897479661.

The spelling of 28008535 in words is "twenty-eight million, eight thousand, five hundred thirty-five".