28008836 has 12 divisors (see below), whose sum is σ = 49080528. Its totient is φ = 13985832.

The previous prime is 28008833. The next prime is 28008853. The reversal of 28008836 is 63880082.

It is a junction number, because it is equal to n+sod(n) for n = 28008796 and 28008805.

It is not an unprimeable number, because it can be changed into a prime (28008833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926 + ... + 7541.

It is an arithmetic number, because the mean of its divisors is an integer number (4090044).

Almost surely, 2^28008836 is an apocalyptic number.

It is an amenable number.

28008836 is a deficient number, since it is larger than the sum of its proper divisors (21071692).

28008836 is a wasteful number, since it uses less digits than its factorization.

28008836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9298 (or 9296 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28008836 is about 5292.3374797909. The cubic root of 28008836 is about 303.6908358522.

The spelling of 28008836 in words is "twenty-eight million, eight thousand, eight hundred thirty-six".