28043243 has 2 divisors, whose sum is σ = 28043244. Its totient is φ = 28043242.

The previous prime is 28043227. The next prime is 28043263. The reversal of 28043243 is 34234082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28043243 - 2⁴ = 28043227 is a prime.

It is not a weakly prime, because it can be changed into another prime (28043263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14021621 + 14021622.

It is an arithmetic number, because the mean of its divisors is an integer number (14021622).

Almost surely, 2^28043243 is an apocalyptic number.

28043243 is a deficient number, since it is larger than the sum of its proper divisors (1).

28043243 is an equidigital number, since it uses as much as digits as its factorization.

28043243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 28043243 is about 5295.5871251449. The cubic root of 28043243 is about 303.8151396592.

The spelling of 28043243 in words is "twenty-eight million, forty-three thousand, two hundred forty-three".