28550105 has 4 divisors (see below), whose sum is σ = 34260132. Its totient is φ = 22840080.

The previous prime is 28550099. The next prime is 28550201. The reversal of 28550105 is 50105582.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3108169 + 25441936 = 1763^2 + 5044^2 .

It is not a de Polignac number, because 28550105 - 2¹⁴ = 28533721 is a prime.

It is a super-2 number, since 2×28550105² = 1630216991022050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2855006 + ... + 2855015.

It is an arithmetic number, because the mean of its divisors is an integer number (8565033).

Almost surely, 2^28550105 is an apocalyptic number.

It is an amenable number.

28550105 is a deficient number, since it is larger than the sum of its proper divisors (5710027).

28550105 is an equidigital number, since it uses as much as digits as its factorization.

28550105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5710026.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 28550105 is about 5343.2298284839. The cubic root of 28550105 is about 305.6346366233.

Adding to 28550105 its reverse (50105582), we get a palindrome (78655687).

The spelling of 28550105 in words is "twenty-eight million, five hundred fifty thousand, one hundred five".