28055143 has 2 divisors, whose sum is σ = 28055144.
Its totient is φ = 28055142.
The previous prime is 28055123. The next prime is 28055201. The reversal of 28055143 is 34155082.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 28055143 - 221 = 25957991 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (28055123) 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, 14027571 + 14027572.
It is an arithmetic number, because the mean of its divisors is an integer number (14027572).
Almost surely, 228055143 is an apocalyptic number.
28055143 is a deficient number, since it is larger than the sum of its proper divisors (1).
28055143 is an equidigital number, since it uses as much as digits as its factorization.
28055143 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 4800, while the sum is 28.
The square root of 28055143 is about 5296.7105829939.
The cubic root of 28055143 is about 303.8581076912.
The spelling of 28055143 in words is "twenty-eight million, fifty-five thousand, one hundred forty-three".