28087141 has 2 divisors, whose sum is σ = 28087142. Its totient is φ = 28087140.

The previous prime is 28087139. The next prime is 28087159. The reversal of 28087141 is 14178082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27984100 + 103041 = 5290^2 + 321^2 .

It is a cyclic number.

It is not a de Polignac number, because 28087141 - 2¹ = 28087139 is a prime.

Together with 28087139, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28087121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14043570 + 14043571.

It is an arithmetic number, because the mean of its divisors is an integer number (14043571).

Almost surely, 2^28087141 is an apocalyptic number.

It is an amenable number.

28087141 is a deficient number, since it is larger than the sum of its proper divisors (1).

28087141 is an equidigital number, since it uses as much as digits as its factorization.

28087141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 28087141 is about 5299.7302761556. The cubic root of 28087141 is about 303.9735845295.

The spelling of 28087141 in words is "twenty-eight million, eighty-seven thousand, one hundred forty-one".