28163243 has 2 divisors, whose sum is σ = 28163244. Its totient is φ = 28163242.

The previous prime is 28163197. The next prime is 28163287. The reversal of 28163243 is 34236182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28163243 - 2⁸ = 28162987 is a prime.

It is not a weakly prime, because it can be changed into another prime (28163743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14081621 + 14081622.

It is an arithmetic number, because the mean of its divisors is an integer number (14081622).

Almost surely, 2^28163243 is an apocalyptic number.

28163243 is a deficient number, since it is larger than the sum of its proper divisors (1).

28163243 is an equidigital number, since it uses as much as digits as its factorization.

28163243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 28163243 is about 5306.9052186750. The cubic root of 28163243 is about 304.2478753660.

The spelling of 28163243 in words is "twenty-eight million, one hundred sixty-three thousand, two hundred forty-three".