28560405 has 8 divisors (see below), whose sum is σ = 45696672. Its totient is φ = 15232208.

The previous prime is 28560403. The next prime is 28560437. The reversal of 28560405 is 50406582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28560405 - 2¹ = 28560403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28560403) 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 7 ways as a sum of consecutive naturals, for example, 951999 + ... + 952028.

It is an arithmetic number, because the mean of its divisors is an integer number (5712084).

Almost surely, 2^28560405 is an apocalyptic number.

It is an amenable number.

28560405 is a deficient number, since it is larger than the sum of its proper divisors (17136267).

28560405 is a wasteful number, since it uses less digits than its factorization.

28560405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904035.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 28560405 is about 5344.1935780808. The cubic root of 28560405 is about 305.6713867306.

Adding to 28560405 its reverse (50406582), we get a palindrome (78966987).

The spelling of 28560405 in words is "twenty-eight million, five hundred sixty thousand, four hundred five".