28707871 has 2 divisors, whose sum is σ = 28707872. Its totient is φ = 28707870.

The previous prime is 28707869. The next prime is 28707901. The reversal of 28707871 is 17870782.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28707871 - 2¹ = 28707869 is a prime.

Together with 28707869, 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 (28702871) 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, 14353935 + 14353936.

It is an arithmetic number, because the mean of its divisors is an integer number (14353936).

Almost surely, 2^28707871 is an apocalyptic number.

28707871 is a deficient number, since it is larger than the sum of its proper divisors (1).

28707871 is an equidigital number, since it uses as much as digits as its factorization.

28707871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43904, while the sum is 40.

The square root of 28707871 is about 5357.9726576383. The cubic root of 28707871 is about 306.1965751038.

The spelling of 28707871 in words is "twenty-eight million, seven hundred seven thousand, eight hundred seventy-one".