28894087 has 2 divisors, whose sum is σ = 28894088. Its totient is φ = 28894086.

The previous prime is 28894081. The next prime is 28894091. The reversal of 28894087 is 78049882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28894087 - 2¹⁵ = 28861319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28894081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14447043 + 14447044.

It is an arithmetic number, because the mean of its divisors is an integer number (14447044).

Almost surely, 2^28894087 is an apocalyptic number.

28894087 is a deficient number, since it is larger than the sum of its proper divisors (1).

28894087 is an equidigital number, since it uses as much as digits as its factorization.

28894087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 28894087 is about 5375.3220368644. The cubic root of 28894087 is about 306.8572052875.

The spelling of 28894087 in words is "twenty-eight million, eight hundred ninety-four thousand, eighty-seven".