28540808 has 8 divisors (see below), whose sum is σ = 53514030. Its totient is φ = 14270400.

The previous prime is 28540789. The next prime is 28540823. The reversal of 28540808 is 80804582.

It can be written as a sum of positive squares in only one way, i.e., 28536964 + 3844 = 5342^2 + 62^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1783793 + ... + 1783808.

Almost surely, 2^28540808 is an apocalyptic number.

It is an amenable number.

28540808 is a deficient number, since it is larger than the sum of its proper divisors (24973222).

28540808 is a wasteful number, since it uses less digits than its factorization.

28540808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567607 (or 3567603 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The square root of 28540808 is about 5342.3597782253. The cubic root of 28540808 is about 305.6014576011.

The spelling of 28540808 in words is "twenty-eight million, five hundred forty thousand, eight hundred eight".