28717907 has 2 divisors, whose sum is σ = 28717908. Its totient is φ = 28717906.

The previous prime is 28717901. The next prime is 28717921. The reversal of 28717907 is 70971782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28717907 - 2⁸ = 28717651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28717901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14358953 + 14358954.

It is an arithmetic number, because the mean of its divisors is an integer number (14358954).

Almost surely, 2^28717907 is an apocalyptic number.

28717907 is a deficient number, since it is larger than the sum of its proper divisors (1).

28717907 is an equidigital number, since it uses as much as digits as its factorization.

28717907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 28717907 is about 5358.9091240662. The cubic root of 28717907 is about 306.2322520882.

The spelling of 28717907 in words is "twenty-eight million, seven hundred seventeen thousand, nine hundred seven".