28130143 has 2 divisors, whose sum is σ = 28130144. Its totient is φ = 28130142.

The previous prime is 28130099. The next prime is 28130149. The reversal of 28130143 is 34103182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28130143 - 2⁹ = 28129631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28130149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14065071 + 14065072.

It is an arithmetic number, because the mean of its divisors is an integer number (14065072).

Almost surely, 2^28130143 is an apocalyptic number.

28130143 is a deficient number, since it is larger than the sum of its proper divisors (1).

28130143 is an equidigital number, since it uses as much as digits as its factorization.

28130143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 28130143 is about 5303.7857234244. The cubic root of 28130143 is about 304.1286353984.

The spelling of 28130143 in words is "twenty-eight million, one hundred thirty thousand, one hundred forty-three".