28359109 has 2 divisors, whose sum is σ = 28359110. Its totient is φ = 28359108.

The previous prime is 28359103. The next prime is 28359127. The reversal of 28359109 is 90195382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27531009 + 828100 = 5247^2 + 910^2 .

It is a cyclic number.

It is not a de Polignac number, because 28359109 - 2³ = 28359101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28359101) 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, 14179554 + 14179555.

It is an arithmetic number, because the mean of its divisors is an integer number (14179555).

Almost surely, 2^28359109 is an apocalyptic number.

It is an amenable number.

28359109 is a deficient number, since it is larger than the sum of its proper divisors (1).

28359109 is an equidigital number, since it uses as much as digits as its factorization.

28359109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 28359109 is about 5325.3271261022. The cubic root of 28359109 is about 304.9515608822.

The spelling of 28359109 in words is "twenty-eight million, three hundred fifty-nine thousand, one hundred nine".