28117214 has 8 divisors (see below), whose sum is σ = 42236640. Its totient is φ = 14038336.

The previous prime is 28117213. The next prime is 28117231. The reversal of 28117214 is 41271182.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28117213) 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, 8339 + ... + 11214.

It is an arithmetic number, because the mean of its divisors is an integer number (5279580).

Almost surely, 2^28117214 is an apocalyptic number.

28117214 is a deficient number, since it is larger than the sum of its proper divisors (14119426).

28117214 is a wasteful number, since it uses less digits than its factorization.

28117214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20274.

The product of its digits is 896, while the sum is 26.

The square root of 28117214 is about 5302.5667369681. The cubic root of 28117214 is about 304.0820343592.

Adding to 28117214 its reverse (41271182), we get a palindrome (69388396).

The spelling of 28117214 in words is "twenty-eight million, one hundred seventeen thousand, two hundred fourteen".