28288087 has 2 divisors, whose sum is σ = 28288088. Its totient is φ = 28288086.

The previous prime is 28288067. The next prime is 28288121. The reversal of 28288087 is 78088282.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28288087 - 2¹¹ = 28286039 is a prime.

It is a super-2 number, since 2×28288087² = 1600431732239138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28288037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14144043 + 14144044.

It is an arithmetic number, because the mean of its divisors is an integer number (14144044).

Almost surely, 2^28288087 is an apocalyptic number.

28288087 is a deficient number, since it is larger than the sum of its proper divisors (1).

28288087 is an equidigital number, since it uses as much as digits as its factorization.

28288087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 114688, while the sum is 43.

The square root of 28288087 is about 5318.6546231166. The cubic root of 28288087 is about 304.6967764890.

The spelling of 28288087 in words is "twenty-eight million, two hundred eighty-eight thousand, eighty-seven".