28140714 has 24 divisors (see below), whose sum is σ = 69682080. Its totient is φ = 8040168.

The previous prime is 28140713. The next prime is 28140731. The reversal of 28140714 is 41704182.

28140714 = 456² + 457² + ... + 563².

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28140713) 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 11 ways as a sum of consecutive naturals, for example, 111544 + ... + 111795.

It is an arithmetic number, because the mean of its divisors is an integer number (2903420).

Almost surely, 2^28140714 is an apocalyptic number.

28140714 is an abundant number, since it is smaller than the sum of its proper divisors (41541366).

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

28140714 is a wasteful number, since it uses less digits than its factorization.

28140714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223354 (or 223351 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 28140714 is about 5304.7821821447. The cubic root of 28140714 is about 304.1667266988.

Adding to 28140714 its reverse (41704182), we get a palindrome (69844896).

The spelling of 28140714 in words is "twenty-eight million, one hundred forty thousand, seven hundred fourteen".