28163249 has 8 divisors (see below), whose sum is σ = 28910880. Its totient is φ = 27425376.

The previous prime is 28163243. The next prime is 28163287. The reversal of 28163249 is 94236182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28163249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28163243) 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, 3602 + ... + 8324.

It is an arithmetic number, because the mean of its divisors is an integer number (3613860).

Almost surely, 2^28163249 is an apocalyptic number.

It is an amenable number.

28163249 is a deficient number, since it is larger than the sum of its proper divisors (747631).

28163249 is an equidigital number, since it uses as much as digits as its factorization.

28163249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4879.

The product of its digits is 20736, while the sum is 35.

The square root of 28163249 is about 5306.9057839762. The cubic root of 28163249 is about 304.2478969721.

The spelling of 28163249 in words is "twenty-eight million, one hundred sixty-three thousand, two hundred forty-nine".