28868117 has 2 divisors, whose sum is σ = 28868118. Its totient is φ = 28868116.

The previous prime is 28868107. The next prime is 28868149. The reversal of 28868117 is 71186882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22648081 + 6220036 = 4759^2 + 2494^2 .

It is a cyclic number.

It is not a de Polignac number, because 28868117 - 2⁶ = 28868053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28868107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14434058 + 14434059.

It is an arithmetic number, because the mean of its divisors is an integer number (14434059).

Almost surely, 2^28868117 is an apocalyptic number.

It is an amenable number.

28868117 is a deficient number, since it is larger than the sum of its proper divisors (1).

28868117 is an equidigital number, since it uses as much as digits as its factorization.

28868117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 41.

The square root of 28868117 is about 5372.9058245981. The cubic root of 28868117 is about 306.7652433306.

The spelling of 28868117 in words is "twenty-eight million, eight hundred sixty-eight thousand, one hundred seventeen".