28648117 has 2 divisors, whose sum is σ = 28648118. Its totient is φ = 28648116.

The previous prime is 28648097. The next prime is 28648127. The reversal of 28648117 is 71184682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19000881 + 9647236 = 4359^2 + 3106^2 .

It is a cyclic number.

It is not a de Polignac number, because 28648117 - 2¹¹ = 28646069 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 (28648127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14324058 + 14324059.

It is an arithmetic number, because the mean of its divisors is an integer number (14324059).

Almost surely, 2^28648117 is an apocalyptic number.

It is an amenable number.

28648117 is a deficient number, since it is larger than the sum of its proper divisors (1).

28648117 is an equidigital number, since it uses as much as digits as its factorization.

28648117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 37.

The square root of 28648117 is about 5352.3935767094. The cubic root of 28648117 is about 305.9839832419.

The spelling of 28648117 in words is "twenty-eight million, six hundred forty-eight thousand, one hundred seventeen".