28275307 has 2 divisors, whose sum is σ = 28275308. Its totient is φ = 28275306.

The previous prime is 28275239. The next prime is 28275323. The reversal of 28275307 is 70357282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28275307 - 2⁷ = 28275179 is a prime.

It is not a weakly prime, because it can be changed into another prime (28275367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14137653 + 14137654.

It is an arithmetic number, because the mean of its divisors is an integer number (14137654).

Almost surely, 2^28275307 is an apocalyptic number.

28275307 is a deficient number, since it is larger than the sum of its proper divisors (1).

28275307 is an equidigital number, since it uses as much as digits as its factorization.

28275307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 28275307 is about 5317.4530557401. The cubic root of 28275307 is about 304.6508842451.

It can be divided in two parts, 28275 and 307, that added together give a palindrome (28582).

The spelling of 28275307 in words is "twenty-eight million, two hundred seventy-five thousand, three hundred seven".