28232317 has 2 divisors, whose sum is σ = 28232318. Its totient is φ = 28232316.

The previous prime is 28232299. The next prime is 28232327. The reversal of 28232317 is 71323282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27941796 + 290521 = 5286^2 + 539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28232317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28232327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14116158 + 14116159.

It is an arithmetic number, because the mean of its divisors is an integer number (14116159).

Almost surely, 2^28232317 is an apocalyptic number.

It is an amenable number.

28232317 is a deficient number, since it is larger than the sum of its proper divisors (1).

28232317 is an equidigital number, since it uses as much as digits as its factorization.

28232317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 28232317 is about 5313.4091692622. The cubic root of 28232317 is about 304.4964080598.

Adding to 28232317 its reverse (71323282), we get a palindrome (99555599).

The spelling of 28232317 in words is "twenty-eight million, two hundred thirty-two thousand, three hundred seventeen".