28406105 has 32 divisors (see below), whose sum is σ = 42336000. Its totient is φ = 17816832.

The previous prime is 28406087. The next prime is 28406107. The reversal of 28406105 is 50160482.

It is a cyclic number.

It is not a de Polignac number, because 28406105 - 2²⁰ = 27357529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28406107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67586 + ... + 68004.

It is an arithmetic number, because the mean of its divisors is an integer number (1323000).

Almost surely, 2^28406105 is an apocalyptic number.

It is an amenable number.

28406105 is a deficient number, since it is larger than the sum of its proper divisors (13929895).

28406105 is a wasteful number, since it uses less digits than its factorization.

28406105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 28406105 is about 5329.7377984287. The cubic root of 28406105 is about 305.1199205938.

Adding to 28406105 its reverse (50160482), we get a palindrome (78566587).

The spelling of 28406105 in words is "twenty-eight million, four hundred six thousand, one hundred five".