28000787 has 2 divisors, whose sum is σ = 28000788. Its totient is φ = 28000786.

The previous prime is 28000771. The next prime is 28000789. The reversal of 28000787 is 78700082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28000787 - 2⁴ = 28000771 is a prime.

Together with 28000789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28000789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14000393 + 14000394.

It is an arithmetic number, because the mean of its divisors is an integer number (14000394).

Almost surely, 2^28000787 is an apocalyptic number.

28000787 is a deficient number, since it is larger than the sum of its proper divisors (1).

28000787 is an equidigital number, since it uses as much as digits as its factorization.

28000787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 28000787 is about 5291.5769861167. The cubic root of 28000787 is about 303.6617421556.

The spelling of 28000787 in words is "twenty-eight million, seven hundred eighty-seven", and thus it is an aban number.