28847217 has 8 divisors (see below), whose sum is σ = 43957696. Its totient is φ = 16484112.

The previous prime is 28847213. The next prime is 28847219. The reversal of 28847217 is 71274882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28847217 - 2² = 28847213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28847213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686818 + ... + 686859.

It is an arithmetic number, because the mean of its divisors is an integer number (5494712).

Almost surely, 2^28847217 is an apocalyptic number.

It is an amenable number.

28847217 is a deficient number, since it is larger than the sum of its proper divisors (15110479).

28847217 is a wasteful number, since it uses less digits than its factorization.

28847217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373687.

The product of its digits is 50176, while the sum is 39.

The square root of 28847217 is about 5370.9605286206. The cubic root of 28847217 is about 306.6911946092.

It can be divided in two parts, 2884 and 7217, that added together give a palindrome (10101).

The spelling of 28847217 in words is "twenty-eight million, eight hundred forty-seven thousand, two hundred seventeen".