28127987 has 2 divisors, whose sum is σ = 28127988. Its totient is φ = 28127986.

The previous prime is 28127959. The next prime is 28128017. The reversal of 28127987 is 78972182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28127987 - 2⁸ = 28127731 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28127887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14063993 + 14063994.

It is an arithmetic number, because the mean of its divisors is an integer number (14063994).

Almost surely, 2^28127987 is an apocalyptic number.

28127987 is a deficient number, since it is larger than the sum of its proper divisors (1).

28127987 is an equidigital number, since it uses as much as digits as its factorization.

28127987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 44.

The square root of 28127987 is about 5303.5824684830. The cubic root of 28127987 is about 304.1208653456.

The spelling of 28127987 in words is "twenty-eight million, one hundred twenty-seven thousand, nine hundred eighty-seven".