28095811 has 4 divisors (see below), whose sum is σ = 29317392. Its totient is φ = 26874232.

The previous prime is 28095779. The next prime is 28095817. The reversal of 28095811 is 11859082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28095811 - 2⁵ = 28095779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28095817) 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 3 ways as a sum of consecutive naturals, for example, 610756 + ... + 610801.

It is an arithmetic number, because the mean of its divisors is an integer number (7329348).

Almost surely, 2^28095811 is an apocalyptic number.

28095811 is a deficient number, since it is larger than the sum of its proper divisors (1221581).

28095811 is a wasteful number, since it uses less digits than its factorization.

28095811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221580.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 28095811 is about 5300.5481791981. The cubic root of 28095811 is about 304.0048583884.

The spelling of 28095811 in words is "twenty-eight million, ninety-five thousand, eight hundred eleven".