28083105 has 20 divisors (see below), whose sum is σ = 50342292. Its totient is φ = 14977440.

The previous prime is 28083103. The next prime is 28083109. The reversal of 28083105 is 50138082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8714304 + 19368801 = 2952^2 + 4401^2 .

It is not a de Polignac number, because 28083105 - 2¹ = 28083103 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28083101) 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 19 ways as a sum of consecutive naturals, for example, 34266 + ... + 35075.

Almost surely, 2^28083105 is an apocalyptic number.

It is an amenable number.

28083105 is a deficient number, since it is larger than the sum of its proper divisors (22259187).

28083105 is an equidigital number, since it uses as much as digits as its factorization.

28083105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69358 (or 69349 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 28083105 is about 5299.3494883806. The cubic root of 28083105 is about 303.9590239381.

The spelling of 28083105 in words is "twenty-eight million, eighty-three thousand, one hundred five".