28886687 has 2 divisors, whose sum is σ = 28886688. Its totient is φ = 28886686.

The previous prime is 28886681. The next prime is 28886719. The reversal of 28886687 is 78668882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28886687 - 2¹⁰ = 28885663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28886681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14443343 + 14443344.

It is an arithmetic number, because the mean of its divisors is an integer number (14443344).

Almost surely, 2^28886687 is an apocalyptic number.

28886687 is a deficient number, since it is larger than the sum of its proper divisors (1).

28886687 is an equidigital number, since it uses as much as digits as its factorization.

28886687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2064384, while the sum is 53.

The square root of 28886687 is about 5374.6336619346. The cubic root of 28886687 is about 306.8310068800.

The spelling of 28886687 in words is "twenty-eight million, eight hundred eighty-six thousand, six hundred eighty-seven".