28288243 has 2 divisors, whose sum is σ = 28288244. Its totient is φ = 28288242.

The previous prime is 28288231. The next prime is 28288259. The reversal of 28288243 is 34288282.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28288243 is a prime.

It is not a weakly prime, because it can be changed into another prime (28288943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14144121 + 14144122.

It is an arithmetic number, because the mean of its divisors is an integer number (14144122).

Almost surely, 2^28288243 is an apocalyptic number.

28288243 is a deficient number, since it is larger than the sum of its proper divisors (1).

28288243 is an equidigital number, since it uses as much as digits as its factorization.

28288243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49152, while the sum is 37.

The square root of 28288243 is about 5318.6692884593. The cubic root of 28288243 is about 304.6973365906.

The spelling of 28288243 in words is "twenty-eight million, two hundred eighty-eight thousand, two hundred forty-three".