28106811 has 16 divisors (see below), whose sum is σ = 41776800. Its totient is φ = 18676224.

The previous prime is 28106807. The next prime is 28106839. The reversal of 28106811 is 11860182.

It is not a de Polignac number, because 28106811 - 2² = 28106807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28106891) 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, 7555 + ... + 10643.

It is an arithmetic number, because the mean of its divisors is an integer number (2611050).

Almost surely, 2^28106811 is an apocalyptic number.

28106811 is a deficient number, since it is larger than the sum of its proper divisors (13669989).

28106811 is a wasteful number, since it uses less digits than its factorization.

28106811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3435 (or 3429 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 28106811 is about 5301.5857061826. The cubic root of 28106811 is about 304.0445276131.

Adding to 28106811 its reverse (11860182), we get a palindrome (39966993).

The spelling of 28106811 in words is "twenty-eight million, one hundred six thousand, eight hundred eleven".