28195579 has 2 divisors, whose sum is σ = 28195580. Its totient is φ = 28195578.

The previous prime is 28195567. The next prime is 28195597. The reversal of 28195579 is 97559182.

Together with next prime (28195597) 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 28195579 - 2¹⁵ = 28162811 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28195379) 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, 14097789 + 14097790.

It is an arithmetic number, because the mean of its divisors is an integer number (14097790).

Almost surely, 2^28195579 is an apocalyptic number.

28195579 is a deficient number, since it is larger than the sum of its proper divisors (1).

28195579 is an equidigital number, since it uses as much as digits as its factorization.

28195579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 46.

The square root of 28195579 is about 5309.9509413930. The cubic root of 28195579 is about 304.3642729039.

The spelling of 28195579 in words is "twenty-eight million, one hundred ninety-five thousand, five hundred seventy-nine".