28394143 has 2 divisors, whose sum is σ = 28394144. Its totient is φ = 28394142.

The previous prime is 28394141. The next prime is 28394159. The reversal of 28394143 is 34149382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28394143 - 2¹ = 28394141 is a prime.

Together with 28394141, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 28394099 and 28394108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28394141) 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, 14197071 + 14197072.

It is an arithmetic number, because the mean of its divisors is an integer number (14197072).

Almost surely, 2^28394143 is an apocalyptic number.

28394143 is a deficient number, since it is larger than the sum of its proper divisors (1).

28394143 is an equidigital number, since it uses as much as digits as its factorization.

28394143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 28394143 is about 5328.6154862215. The cubic root of 28394143 is about 305.0770852369.

The spelling of 28394143 in words is "twenty-eight million, three hundred ninety-four thousand, one hundred forty-three".