28803917 has 2 divisors, whose sum is σ = 28803918. Its totient is φ = 28803916.

The previous prime is 28803913. The next prime is 28803941. The reversal of 28803917 is 71930882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18887716 + 9916201 = 4346^2 + 3149^2 .

It is a cyclic number.

It is not a de Polignac number, because 28803917 - 2² = 28803913 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 (28803911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14401958 + 14401959.

It is an arithmetic number, because the mean of its divisors is an integer number (14401959).

Almost surely, 2^28803917 is an apocalyptic number.

It is an amenable number.

28803917 is a deficient number, since it is larger than the sum of its proper divisors (1).

28803917 is an equidigital number, since it uses as much as digits as its factorization.

28803917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 28803917 is about 5366.9280785194. The cubic root of 28803917 is about 306.5376687814.

The spelling of 28803917 in words is "twenty-eight million, eight hundred three thousand, nine hundred seventeen".