28387087 has 2 divisors, whose sum is σ = 28387088. Its totient is φ = 28387086.

The previous prime is 28387081. The next prime is 28387091. The reversal of 28387087 is 78078382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28387087 - 2¹⁹ = 27862799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28387081) 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, 14193543 + 14193544.

It is an arithmetic number, because the mean of its divisors is an integer number (14193544).

Almost surely, 2^28387087 is an apocalyptic number.

28387087 is a deficient number, since it is larger than the sum of its proper divisors (1).

28387087 is an equidigital number, since it uses as much as digits as its factorization.

28387087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 28387087 is about 5327.9533594055. The cubic root of 28387087 is about 305.0518123928.

The spelling of 28387087 in words is "twenty-eight million, three hundred eighty-seven thousand, eighty-seven".