26728543 has 2 divisors, whose sum is σ = 26728544. Its totient is φ = 26728542.

The previous prime is 26728487. The next prime is 26728601. The reversal of 26728543 is 34582762.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26728543 - 2¹⁷ = 26597471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26728043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13364271 + 13364272.

It is an arithmetic number, because the mean of its divisors is an integer number (13364272).

Almost surely, 2^26728543 is an apocalyptic number.

26728543 is a deficient number, since it is larger than the sum of its proper divisors (1).

26728543 is an equidigital number, since it uses as much as digits as its factorization.

26728543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 26728543 is about 5169.9654737725. The cubic root of 26728543 is about 298.9912153510.

The spelling of 26728543 in words is "twenty-six million, seven hundred twenty-eight thousand, five hundred forty-three".