28408845 has 16 divisors (see below), whose sum is σ = 45577152. Its totient is φ = 15110400.

The previous prime is 28408801. The next prime is 28408847. The reversal of 28408845 is 54880482.

It is not a de Polignac number, because 28408845 - 2⁹ = 28408333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28408847) 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 15 ways as a sum of consecutive naturals, for example, 3654 + ... + 8376.

It is an arithmetic number, because the mean of its divisors is an integer number (2848572).

Almost surely, 2^28408845 is an apocalyptic number.

It is an amenable number.

28408845 is a deficient number, since it is larger than the sum of its proper divisors (17168307).

28408845 is a wasteful number, since it uses less digits than its factorization.

28408845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5132.

The product of its (nonzero) digits is 81920, while the sum is 39.

The square root of 28408845 is about 5329.9948405228. The cubic root of 28408845 is about 305.1297307115.

The spelling of 28408845 in words is "twenty-eight million, four hundred eight thousand, eight hundred forty-five".