28664087 has 2 divisors, whose sum is σ = 28664088. Its totient is φ = 28664086.

The previous prime is 28664071. The next prime is 28664131. The reversal of 28664087 is 78046682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28664087 - 2⁴ = 28664071 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28664287) 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, 14332043 + 14332044.

It is an arithmetic number, because the mean of its divisors is an integer number (14332044).

Almost surely, 2^28664087 is an apocalyptic number.

28664087 is a deficient number, since it is larger than the sum of its proper divisors (1).

28664087 is an equidigital number, since it uses as much as digits as its factorization.

28664087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 28664087 is about 5353.8852247690. The cubic root of 28664087 is about 306.0408299854.

The spelling of 28664087 in words is "twenty-eight million, six hundred sixty-four thousand, eighty-seven".