28630717 has 2 divisors, whose sum is σ = 28630718. Its totient is φ = 28630716.

The previous prime is 28630691. The next prime is 28630757. The reversal of 28630717 is 71703682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21771556 + 6859161 = 4666^2 + 2619^2 .

It is a cyclic number.

It is not a de Polignac number, because 28630717 - 2²³ = 20242109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28630757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14315358 + 14315359.

It is an arithmetic number, because the mean of its divisors is an integer number (14315359).

Almost surely, 2^28630717 is an apocalyptic number.

It is an amenable number.

28630717 is a deficient number, since it is larger than the sum of its proper divisors (1).

28630717 is an equidigital number, since it uses as much as digits as its factorization.

28630717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 28630717 is about 5350.7678888175. The cubic root of 28630717 is about 305.9220222227.

The spelling of 28630717 in words is "twenty-eight million, six hundred thirty thousand, seven hundred seventeen".