28008867 has 16 divisors (see below), whose sum is σ = 39536640. Its totient is φ = 17607072.

The previous prime is 28008853. The next prime is 28008887. The reversal of 28008867 is 76880082.

It is not a de Polignac number, because 28008867 - 2⁶ = 28008803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28008817) 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 15 ways as a sum of consecutive naturals, for example, 3 + ... + 7484.

It is an arithmetic number, because the mean of its divisors is an integer number (2471040).

Almost surely, 2^28008867 is an apocalyptic number.

28008867 is a deficient number, since it is larger than the sum of its proper divisors (11527773).

28008867 is a wasteful number, since it uses less digits than its factorization.

28008867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7562.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 28008867 is about 5292.3404085527. The cubic root of 28008867 is about 303.6909478931.

The spelling of 28008867 in words is "twenty-eight million, eight thousand, eight hundred sixty-seven".