28006879 has 2 divisors, whose sum is σ = 28006880. Its totient is φ = 28006878.

The previous prime is 28006859. The next prime is 28006897. The reversal of 28006879 is 97860082.

Together with next prime (28006897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28006879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28006819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14003439 + 14003440.

It is an arithmetic number, because the mean of its divisors is an integer number (14003440).

Almost surely, 2^28006879 is an apocalyptic number.

28006879 is a deficient number, since it is larger than the sum of its proper divisors (1).

28006879 is an equidigital number, since it uses as much as digits as its factorization.

28006879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 28006879 is about 5292.1525866135. The cubic root of 28006879 is about 303.6837626461.

The spelling of 28006879 in words is "twenty-eight million, six thousand, eight hundred seventy-nine".