28243508143 has 2 divisors, whose sum is σ = 28243508144. Its totient is φ = 28243508142.

The previous prime is 28243508141. The next prime is 28243508159. The reversal of 28243508143 is 34180534282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28243508143 - 2¹ = 28243508141 is a prime.

Together with 28243508141, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 28243508096 and 28243508105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28243508141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14121754071 + 14121754072.

It is an arithmetic number, because the mean of its divisors is an integer number (14121754072).

Almost surely, 2^28243508143 is an apocalyptic number.

28243508143 is a deficient number, since it is larger than the sum of its proper divisors (1).

28243508143 is an equidigital number, since it uses as much as digits as its factorization.

28243508143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 28243508143 in words is "twenty-eight billion, two hundred forty-three million, five hundred eight thousand, one hundred forty-three".