28214617 has 4 divisors (see below), whose sum is σ = 28814976. Its totient is φ = 27614260.

The previous prime is 28214591. The next prime is 28214633. The reversal of 28214617 is 71641282.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71641282 = 2 ⋅35820641.

It is a cyclic number.

It is not a de Polignac number, because 28214617 - 2⁷ = 28214489 is a prime.

It is a super-2 number, since 2×28214617² = 1592129224913378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28214647) 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, 300109 + ... + 300202.

It is an arithmetic number, because the mean of its divisors is an integer number (7203744).

Almost surely, 2^28214617 is an apocalyptic number.

It is an amenable number.

28214617 is a deficient number, since it is larger than the sum of its proper divisors (600359).

28214617 is an equidigital number, since it uses as much as digits as its factorization.

28214617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600358.

The product of its digits is 5376, while the sum is 31.

The square root of 28214617 is about 5311.7433108161. The cubic root of 28214617 is about 304.4327609855.

Adding to 28214617 its reverse (71641282), we get a palindrome (99855899).

The spelling of 28214617 in words is "twenty-eight million, two hundred fourteen thousand, six hundred seventeen".