28558879 has 2 divisors, whose sum is σ = 28558880. Its totient is φ = 28558878.

The previous prime is 28558877. The next prime is 28558897. The reversal of 28558879 is 97885582.

It is a happy number.

Together with next prime (28558897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28558879 - 2¹ = 28558877 is a prime.

Together with 28558877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28558877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14279439 + 14279440.

It is an arithmetic number, because the mean of its divisors is an integer number (14279440).

Almost surely, 2^28558879 is an apocalyptic number.

28558879 is a deficient number, since it is larger than the sum of its proper divisors (1).

28558879 is an equidigital number, since it uses as much as digits as its factorization.

28558879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612800, while the sum is 52.

The square root of 28558879 is about 5344.0508043992. The cubic root of 28558879 is about 305.6659425636.

The spelling of 28558879 in words is "twenty-eight million, five hundred fifty-eight thousand, eight hundred seventy-nine".