28075207 has 2 divisors, whose sum is σ = 28075208. Its totient is φ = 28075206.

The previous prime is 28075199. The next prime is 28075231. The reversal of 28075207 is 70257082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28075207 - 2³ = 28075199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28073207) 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, 14037603 + 14037604.

It is an arithmetic number, because the mean of its divisors is an integer number (14037604).

Almost surely, 2^28075207 is an apocalyptic number.

28075207 is a deficient number, since it is larger than the sum of its proper divisors (1).

28075207 is an equidigital number, since it uses as much as digits as its factorization.

28075207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 28075207 is about 5298.6042501776. The cubic root of 28075207 is about 303.9305264547.

It can be divided in two parts, 28075 and 207, that added together give a palindrome (28282).

The spelling of 28075207 in words is "twenty-eight million, seventy-five thousand, two hundred seven".