28471847 has 2 divisors, whose sum is σ = 28471848. Its totient is φ = 28471846.

The previous prime is 28471841. The next prime is 28471867. The reversal of 28471847 is 74817482.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28471847 - 2⁶ = 28471783 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28471841) 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, 14235923 + 14235924.

It is an arithmetic number, because the mean of its divisors is an integer number (14235924).

Almost surely, 2^28471847 is an apocalyptic number.

28471847 is a deficient number, since it is larger than the sum of its proper divisors (1).

28471847 is an equidigital number, since it uses as much as digits as its factorization.

28471847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100352, while the sum is 41.

The square root of 28471847 is about 5335.9017044919. The cubic root of 28471847 is about 305.3551251850.

The spelling of 28471847 in words is "twenty-eight million, four hundred seventy-one thousand, eight hundred forty-seven".