28162105 has 12 divisors (see below), whose sum is σ = 34925796. Its totient is φ = 21799200.

The previous prime is 28162093. The next prime is 28162111. The reversal of 28162105 is 50126182.

It can be written as a sum of positive squares in 2 ways, for example, as 11417641 + 16744464 = 3379^2 + 4092^2 .

It is not a de Polignac number, because 28162105 - 2⁵ = 28162073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28162105.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1875 + ... + 7735.

It is an arithmetic number, because the mean of its divisors is an integer number (2910483).

Almost surely, 2^28162105 is an apocalyptic number.

It is an amenable number.

28162105 is a deficient number, since it is larger than the sum of its proper divisors (6763691).

28162105 is an equidigital number, since it uses as much as digits as its factorization.

28162105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5928 (or 5897 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 28162105 is about 5306.7979987936. The cubic root of 28162105 is about 304.2437773680.

Adding to 28162105 its reverse (50126182), we get a palindrome (78288287).

The spelling of 28162105 in words is "twenty-eight million, one hundred sixty-two thousand, one hundred five".