28114249 has 4 divisors (see below), whose sum is σ = 28142100. Its totient is φ = 28086400.

The previous prime is 28114231. The next prime is 28114291. The reversal of 28114249 is 94241182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18147600 + 9966649 = 4260^2 + 3157^2 .

It is a cyclic number.

It is not a de Polignac number, because 28114249 - 2⁹ = 28113737 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28114249.

It is not an unprimeable number, because it can be changed into a prime (28114649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12352 + ... + 14449.

It is an arithmetic number, because the mean of its divisors is an integer number (7035525).

Almost surely, 2^28114249 is an apocalyptic number.

It is an amenable number.

28114249 is a deficient number, since it is larger than the sum of its proper divisors (27851).

28114249 is a wasteful number, since it uses less digits than its factorization.

28114249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27850.

The product of its digits is 4608, while the sum is 31.

The square root of 28114249 is about 5302.2871480145. The cubic root of 28114249 is about 304.0713453565.

The spelling of 28114249 in words is "twenty-eight million, one hundred fourteen thousand, two hundred forty-nine".