28348217 has 4 divisors (see below), whose sum is σ = 28364160. Its totient is φ = 28332276.

The previous prime is 28348211. The next prime is 28348219. The reversal of 28348217 is 71284382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28348217 - 2¹⁴ = 28331833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28348211) 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 in 3 ways as a sum of consecutive naturals, for example, 4913 + ... + 8990.

It is an arithmetic number, because the mean of its divisors is an integer number (7091040).

Almost surely, 2^28348217 is an apocalyptic number.

It is an amenable number.

28348217 is a deficient number, since it is larger than the sum of its proper divisors (15943).

28348217 is a wasteful number, since it uses less digits than its factorization.

28348217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15942.

The product of its digits is 21504, while the sum is 35.

The square root of 28348217 is about 5324.3043677085. The cubic root of 28348217 is about 304.9125145482.

It can be divided in two parts, 28348 and 217, that multiplied together give a palindrome (6151516).

The spelling of 28348217 in words is "twenty-eight million, three hundred forty-eight thousand, two hundred seventeen".