28447543 has 2 divisors, whose sum is σ = 28447544. Its totient is φ = 28447542.

The previous prime is 28447537. The next prime is 28447547. The reversal of 28447543 is 34574482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28447543 - 2¹⁷ = 28316471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28447547) 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, 14223771 + 14223772.

It is an arithmetic number, because the mean of its divisors is an integer number (14223772).

Almost surely, 2^28447543 is an apocalyptic number.

28447543 is a deficient number, since it is larger than the sum of its proper divisors (1).

28447543 is an equidigital number, since it uses as much as digits as its factorization.

28447543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 37.

The square root of 28447543 is about 5333.6238150061. The cubic root of 28447543 is about 305.2682151972.

The spelling of 28447543 in words is "twenty-eight million, four hundred forty-seven thousand, five hundred forty-three".