28099417 has 2 divisors, whose sum is σ = 28099418. Its totient is φ = 28099416.

The previous prime is 28099387. The next prime is 28099427. The reversal of 28099417 is 71499082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18139081 + 9960336 = 4259^2 + 3156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28099417 is a prime.

It is a super-3 number, since 3×28099417³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28099417.

It is not a weakly prime, because it can be changed into another prime (28099427) 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, 14049708 + 14049709.

It is an arithmetic number, because the mean of its divisors is an integer number (14049709).

Almost surely, 2^28099417 is an apocalyptic number.

It is an amenable number.

28099417 is a deficient number, since it is larger than the sum of its proper divisors (1).

28099417 is an equidigital number, since it uses as much as digits as its factorization.

28099417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 28099417 is about 5300.8883217815. Note that the first 3 decimals coincide. The cubic root of 28099417 is about 304.0178638221.

The spelling of 28099417 in words is "twenty-eight million, ninety-nine thousand, four hundred seventeen".