28809718043 has 2 divisors, whose sum is σ = 28809718044. Its totient is φ = 28809718042.

The previous prime is 28809718001. The next prime is 28809718057. The reversal of 28809718043 is 34081790882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28809718043 - 2⁸ = 28809717787 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 28809717982 and 28809718000.

It is not a weakly prime, because it can be changed into another prime (28809718543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14404859021 + 14404859022.

It is an arithmetic number, because the mean of its divisors is an integer number (14404859022).

Almost surely, 2^28809718043 is an apocalyptic number.

28809718043 is a deficient number, since it is larger than the sum of its proper divisors (1).

28809718043 is an equidigital number, since it uses as much as digits as its factorization.

28809718043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 28809718043 in words is "twenty-eight billion, eight hundred nine million, seven hundred eighteen thousand, forty-three".