28055887 has 2 divisors, whose sum is σ = 28055888. Its totient is φ = 28055886.

The previous prime is 28055873. The next prime is 28055897. The reversal of 28055887 is 78855082.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28055887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28055827) 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 as a sum of consecutive naturals, namely, 14027943 + 14027944.

It is an arithmetic number, because the mean of its divisors is an integer number (14027944).

Almost surely, 2^28055887 is an apocalyptic number.

28055887 is a deficient number, since it is larger than the sum of its proper divisors (1).

28055887 is an equidigital number, since it uses as much as digits as its factorization.

28055887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 179200, while the sum is 43.

The square root of 28055887 is about 5296.7808147969. The cubic root of 28055887 is about 303.8607936923.

The spelling of 28055887 in words is "twenty-eight million, fifty-five thousand, eight hundred eighty-seven".