28056143 has 2 divisors, whose sum is σ = 28056144.
Its totient is φ = 28056142.
The previous prime is 28056097. The next prime is 28056187. The reversal of 28056143 is 34165082.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 28056143 - 28 = 28055887 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (28056943) 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, 14028071 + 14028072.
It is an arithmetic number, because the mean of its divisors is an integer number (14028072).
Almost surely, 228056143 is an apocalyptic number.
28056143 is a deficient number, since it is larger than the sum of its proper divisors (1).
28056143 is an equidigital number, since it uses as much as digits as its factorization.
28056143 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 5760, while the sum is 29.
The square root of 28056143 is about 5296.8049803632.
The cubic root of 28056143 is about 303.8617178967.
The spelling of 28056143 in words is "twenty-eight million, fifty-six thousand, one hundred forty-three".