28866009971 has 2 divisors, whose sum is σ = 28866009972. Its totient is φ = 28866009970.

The previous prime is 28866009961. The next prime is 28866010027. The reversal of 28866009971 is 17990066882.

It is an a-pointer prime, because the next prime (28866010027) can be obtained adding 28866009971 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28866009971 - 2¹⁰ = 28866008947 is a prime.

It is not a weakly prime, because it can be changed into another prime (28866009961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14433004985 + 14433004986.

It is an arithmetic number, because the mean of its divisors is an integer number (14433004986).

Almost surely, 2^28866009971 is an apocalyptic number.

28866009971 is a deficient number, since it is larger than the sum of its proper divisors (1).

28866009971 is an equidigital number, since it uses as much as digits as its factorization.

28866009971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 28866009971 in words is "twenty-eight billion, eight hundred sixty-six million, nine thousand, nine hundred seventy-one".