28943443 has 2 divisors, whose sum is σ = 28943444. Its totient is φ = 28943442.

The previous prime is 28943389. The next prime is 28943449. The reversal of 28943443 is 34434982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28943443 - 2⁹ = 28942931 is a prime.

It is a super-3 number, since 3×28943443³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (28943449) 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, 14471721 + 14471722.

It is an arithmetic number, because the mean of its divisors is an integer number (14471722).

Almost surely, 2^28943443 is an apocalyptic number.

28943443 is a deficient number, since it is larger than the sum of its proper divisors (1).

28943443 is an equidigital number, since it uses as much as digits as its factorization.

28943443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 37.

The square root of 28943443 is about 5379.9110587444. The cubic root of 28943443 is about 307.0318272767.

The spelling of 28943443 in words is "twenty-eight million, nine hundred forty-three thousand, four hundred forty-three".