28603217 has 2 divisors, whose sum is σ = 28603218. Its totient is φ = 28603216.

The previous prime is 28603153. The next prime is 28603219. The reversal of 28603217 is 71230682.

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., 28472896 + 130321 = 5336^2 + 361^2 .

It is a cyclic number.

It is not a de Polignac number, because 28603217 - 2⁶ = 28603153 is a prime.

Together with 28603219, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28603217.

It is not a weakly prime, because it can be changed into another prime (28603219) 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, 14301608 + 14301609.

It is an arithmetic number, because the mean of its divisors is an integer number (14301609).

Almost surely, 2^28603217 is an apocalyptic number.

It is an amenable number.

28603217 is a deficient number, since it is larger than the sum of its proper divisors (1).

28603217 is an equidigital number, since it uses as much as digits as its factorization.

28603217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 28603217 is about 5348.1975468376. The cubic root of 28603217 is about 305.8240441131.

Adding to 28603217 its reverse (71230682), we get a palindrome (99833899).

The spelling of 28603217 in words is "twenty-eight million, six hundred three thousand, two hundred seventeen".