28105837 has 2 divisors, whose sum is σ = 28105838. Its totient is φ = 28105836.

The previous prime is 28105813. The next prime is 28105853. The reversal of 28105837 is 73850182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27678121 + 427716 = 5261^2 + 654^2 .

It is a cyclic number.

It is not a de Polignac number, because 28105837 - 2¹⁹ = 27581549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28105867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14052918 + 14052919.

It is an arithmetic number, because the mean of its divisors is an integer number (14052919).

Almost surely, 2^28105837 is an apocalyptic number.

It is an amenable number.

28105837 is a deficient number, since it is larger than the sum of its proper divisors (1).

28105837 is an equidigital number, since it uses as much as digits as its factorization.

28105837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 28105837 is about 5301.4938460777. The cubic root of 28105837 is about 304.0410155013.

The spelling of 28105837 in words is "twenty-eight million, one hundred five thousand, eight hundred thirty-seven".