28348643 has 2 divisors, whose sum is σ = 28348644. Its totient is φ = 28348642.

The previous prime is 28348637. The next prime is 28348651. The reversal of 28348643 is 34684382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28348643 - 2⁸ = 28348387 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 28348597 and 28348606.

It is not a weakly prime, because it can be changed into another prime (28348603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14174321 + 14174322.

It is an arithmetic number, because the mean of its divisors is an integer number (14174322).

Almost surely, 2^28348643 is an apocalyptic number.

28348643 is a deficient number, since it is larger than the sum of its proper divisors (1).

28348643 is an equidigital number, since it uses as much as digits as its factorization.

28348643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 38.

The square root of 28348643 is about 5324.3443727843. The cubic root of 28348643 is about 304.9140418880.

The spelling of 28348643 in words is "twenty-eight million, three hundred forty-eight thousand, six hundred forty-three".