28608541 has 4 divisors (see below), whose sum is σ = 30809212. Its totient is φ = 26407872.

The previous prime is 28608521. The next prime is 28608551. The reversal of 28608541 is 14580682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14580682 = 2 ⋅7290341.

It can be written as a sum of positive squares in 2 ways, for example, as 10588516 + 18020025 = 3254^2 + 4245^2 .

It is a cyclic number.

It is not a de Polignac number, because 28608541 - 2¹¹ = 28606493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28608497 and 28608506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28608521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1100316 + ... + 1100341.

It is an arithmetic number, because the mean of its divisors is an integer number (7702303).

Almost surely, 2^28608541 is an apocalyptic number.

It is an amenable number.

28608541 is a deficient number, since it is larger than the sum of its proper divisors (2200671).

28608541 is a wasteful number, since it uses less digits than its factorization.

28608541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200670.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 28608541 is about 5348.6952614633. The cubic root of 28608541 is about 305.8430175757.

The spelling of 28608541 in words is "twenty-eight million, six hundred eight thousand, five hundred forty-one".