28218714 has 16 divisors (see below), whose sum is σ = 56528928. Its totient is φ = 9390992.

The previous prime is 28218637. The next prime is 28218719. The reversal of 28218714 is 41781282.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28218719) 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, 589 + ... + 7535.

It is an arithmetic number, because the mean of its divisors is an integer number (3533058).

Almost surely, 2^28218714 is an apocalyptic number.

28218714 is an abundant number, since it is smaller than the sum of its proper divisors (28310214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28218714 is a wasteful number, since it uses less digits than its factorization.

28218714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7629.

The product of its digits is 7168, while the sum is 33.

The square root of 28218714 is about 5312.1289517481. The cubic root of 28218714 is about 304.4474956725.

Adding to 28218714 its reverse (41781282), we get a palindrome (69999996).

The spelling of 28218714 in words is "twenty-eight million, two hundred eighteen thousand, seven hundred fourteen".