28250087 has 2 divisors, whose sum is σ = 28250088. Its totient is φ = 28250086.

The previous prime is 28250071. The next prime is 28250143. The reversal of 28250087 is 78005282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28250087 - 2⁴ = 28250071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28250987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14125043 + 14125044.

It is an arithmetic number, because the mean of its divisors is an integer number (14125044).

Almost surely, 2^28250087 is an apocalyptic number.

28250087 is a deficient number, since it is larger than the sum of its proper divisors (1).

28250087 is an equidigital number, since it uses as much as digits as its factorization.

28250087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 28250087 is about 5315.0810906326. The cubic root of 28250087 is about 304.5602800913.

The spelling of 28250087 in words is "twenty-eight million, two hundred fifty thousand, eighty-seven".