28396105 has 4 divisors (see below), whose sum is σ = 34075332. Its totient is φ = 22716880.

The previous prime is 28396091. The next prime is 28396129. The reversal of 28396105 is 50169382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50169382 = 2 ⋅25084691.

It can be written as a sum of positive squares in 2 ways, for example, as 3316041 + 25080064 = 1821^2 + 5008^2 .

It is not a de Polignac number, because 28396105 - 2⁷ = 28395977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2839606 + ... + 2839615.

It is an arithmetic number, because the mean of its divisors is an integer number (8518833).

Almost surely, 2^28396105 is an apocalyptic number.

It is an amenable number.

28396105 is a deficient number, since it is larger than the sum of its proper divisors (5679227).

28396105 is an equidigital number, since it uses as much as digits as its factorization.

28396105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5679226.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 28396105 is about 5328.7995833959. The cubic root of 28396105 is about 305.0841118909.

The spelling of 28396105 in words is "twenty-eight million, three hundred ninety-six thousand, one hundred five".