28556873 has 2 divisors, whose sum is σ = 28556874. Its totient is φ = 28556872.

The previous prime is 28556831. The next prime is 28556881. The reversal of 28556873 is 37865582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14992384 + 13564489 = 3872^2 + 3683^2 .

It is a cyclic number.

It is not a de Polignac number, because 28556873 - 2⁶ = 28556809 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28556173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14278436 + 14278437.

It is an arithmetic number, because the mean of its divisors is an integer number (14278437).

Almost surely, 2^28556873 is an apocalyptic number.

It is an amenable number.

28556873 is a deficient number, since it is larger than the sum of its proper divisors (1).

28556873 is an equidigital number, since it uses as much as digits as its factorization.

28556873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 44.

The square root of 28556873 is about 5343.8631157619. The cubic root of 28556873 is about 305.6587856506.

The spelling of 28556873 in words is "twenty-eight million, five hundred fifty-six thousand, eight hundred seventy-three".