28299317 has 2 divisors, whose sum is σ = 28299318. Its totient is φ = 28299316.

The previous prime is 28299263. The next prime is 28299347. The reversal of 28299317 is 71399282.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24512401 + 3786916 = 4951^2 + 1946^2 .

It is a cyclic number.

It is not a de Polignac number, because 28299317 - 2¹⁰ = 28298293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28299347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14149658 + 14149659.

It is an arithmetic number, because the mean of its divisors is an integer number (14149659).

Almost surely, 2^28299317 is an apocalyptic number.

It is an amenable number.

28299317 is a deficient number, since it is larger than the sum of its proper divisors (1).

28299317 is an equidigital number, since it uses as much as digits as its factorization.

28299317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 28299317 is about 5319.7102364697. The cubic root of 28299317 is about 304.7370913643.

It can be divided in two parts, 282 and 99317, that added together give a palindrome (99599).

The spelling of 28299317 in words is "twenty-eight million, two hundred ninety-nine thousand, three hundred seventeen".