28116245 has 8 divisors (see below), whose sum is σ = 33770040. Its totient is φ = 22472640.

The previous prime is 28116241. The next prime is 28116251. The reversal of 28116245 is 54261182.

It can be written as a sum of positive squares in 4 ways, for example, as 669124 + 27447121 = 818^2 + 5239^2 .

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

It is not a de Polignac number, because 28116245 - 2² = 28116241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28116241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6371 + ... + 9839.

It is an arithmetic number, because the mean of its divisors is an integer number (4221255).

Almost surely, 2^28116245 is an apocalyptic number.

It is an amenable number.

28116245 is a deficient number, since it is larger than the sum of its proper divisors (5653795).

28116245 is a wasteful number, since it uses less digits than its factorization.

28116245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5095.

The product of its digits is 3840, while the sum is 29.

The square root of 28116245 is about 5302.4753653365. The cubic root of 28116245 is about 304.0785411388.

The spelling of 28116245 in words is "twenty-eight million, one hundred sixteen thousand, two hundred forty-five".