28128883 has 2 divisors, whose sum is σ = 28128884. Its totient is φ = 28128882.

The previous prime is 28128853. The next prime is 28128887. The reversal of 28128883 is 38882182.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28128883 is a prime.

It is not a weakly prime, because it can be changed into another prime (28128887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14064441 + 14064442.

It is an arithmetic number, because the mean of its divisors is an integer number (14064442).

Almost surely, 2^28128883 is an apocalyptic number.

28128883 is a deficient number, since it is larger than the sum of its proper divisors (1).

28128883 is an equidigital number, since it uses as much as digits as its factorization.

28128883 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49152, while the sum is 40.

The square root of 28128883 is about 5303.6669390149. Note that the first 3 decimals coincide. The cubic root of 28128883 is about 304.1240945067.

The spelling of 28128883 in words is "twenty-eight million, one hundred twenty-eight thousand, eight hundred eighty-three".