28167915887 has 2 divisors, whose sum is σ = 28167915888. Its totient is φ = 28167915886.

The previous prime is 28167915871. The next prime is 28167915907. The reversal of 28167915887 is 78851976182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28167915887 - 2⁴ = 28167915871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28167915827) 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, 14083957943 + 14083957944.

It is an arithmetic number, because the mean of its divisors is an integer number (14083957944).

Almost surely, 2^28167915887 is an apocalyptic number.

28167915887 is a deficient number, since it is larger than the sum of its proper divisors (1).

28167915887 is an equidigital number, since it uses as much as digits as its factorization.

28167915887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13547520, while the sum is 62.

The spelling of 28167915887 in words is "twenty-eight billion, one hundred sixty-seven million, nine hundred fifteen thousand, eight hundred eighty-seven".