28209607 has 2 divisors, whose sum is σ = 28209608. Its totient is φ = 28209606.

The previous prime is 28209593. The next prime is 28209619. The reversal of 28209607 is 70690282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28209607 - 2¹⁵ = 28176839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28209667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14104803 + 14104804.

It is an arithmetic number, because the mean of its divisors is an integer number (14104804).

Almost surely, 2^28209607 is an apocalyptic number.

28209607 is a deficient number, since it is larger than the sum of its proper divisors (1).

28209607 is an equidigital number, since it uses as much as digits as its factorization.

28209607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28209607 is about 5311.2716932953. The cubic root of 28209607 is about 304.4147407938.

Adding to 28209607 its reverse (70690282), we get a palindrome (98899889).

The spelling of 28209607 in words is "twenty-eight million, two hundred nine thousand, six hundred seven".