28811843 has 2 divisors, whose sum is σ = 28811844. Its totient is φ = 28811842.

The previous prime is 28811831. The next prime is 28811851. The reversal of 28811843 is 34811882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28811843 - 2⁶ = 28811779 is a prime.

It is not a weakly prime, because it can be changed into another prime (28811443) 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, 14405921 + 14405922.

It is an arithmetic number, because the mean of its divisors is an integer number (14405922).

Almost surely, 2^28811843 is an apocalyptic number.

28811843 is a deficient number, since it is larger than the sum of its proper divisors (1).

28811843 is an equidigital number, since it uses as much as digits as its factorization.

28811843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 35.

The square root of 28811843 is about 5367.6664389658. Note that the first 3 decimals coincide. The cubic root of 28811843 is about 306.5657829524.

The spelling of 28811843 in words is "twenty-eight million, eight hundred eleven thousand, eight hundred forty-three".