28571143 has 2 divisors, whose sum is σ = 28571144. Its totient is φ = 28571142.

The previous prime is 28571131. The next prime is 28571149. The reversal of 28571143 is 34117582.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28571143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28571149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14285571 + 14285572.

It is an arithmetic number, because the mean of its divisors is an integer number (14285572).

Almost surely, 2^28571143 is an apocalyptic number.

28571143 is a deficient number, since it is larger than the sum of its proper divisors (1).

28571143 is an equidigital number, since it uses as much as digits as its factorization.

28571143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 28571143 is about 5345.1981254206. The cubic root of 28571143 is about 305.7096902033.

The spelling of 28571143 in words is "twenty-eight million, five hundred seventy-one thousand, one hundred forty-three".