28814647 has 2 divisors, whose sum is σ = 28814648. Its totient is φ = 28814646.

The previous prime is 28814641. The next prime is 28814689. The reversal of 28814647 is 74641882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28814647 - 2⁷ = 28814519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28814641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14407323 + 14407324.

It is an arithmetic number, because the mean of its divisors is an integer number (14407324).

Almost surely, 2^28814647 is an apocalyptic number.

28814647 is a deficient number, since it is larger than the sum of its proper divisors (1).

28814647 is an equidigital number, since it uses as much as digits as its factorization.

28814647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 40.

The square root of 28814647 is about 5367.9276261887. The cubic root of 28814647 is about 306.5757277353.

The spelling of 28814647 in words is "twenty-eight million, eight hundred fourteen thousand, six hundred forty-seven".