28426105 has 4 divisors (see below), whose sum is σ = 34111332. Its totient is φ = 22740880.

The previous prime is 28426087. The next prime is 28426121. The reversal of 28426105 is 50162482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50162482 = 2 ⋅25081241.

It can be written as a sum of positive squares in 2 ways, for example, as 16426809 + 11999296 = 4053^2 + 3464^2 .

It is not a de Polignac number, because 28426105 - 2¹³ = 28417913 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2842606 + ... + 2842615.

It is an arithmetic number, because the mean of its divisors is an integer number (8527833).

Almost surely, 2^28426105 is an apocalyptic number.

It is an amenable number.

28426105 is a deficient number, since it is larger than the sum of its proper divisors (5685227).

28426105 is an equidigital number, since it uses as much as digits as its factorization.

28426105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5685226.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28426105 is about 5331.6137331956. The cubic root of 28426105 is about 305.1915127954.

Adding to 28426105 its reverse (50162482), we get a palindrome (78588587).

The spelling of 28426105 in words is "twenty-eight million, four hundred twenty-six thousand, one hundred five".