28567249 has 4 divisors (see below), whose sum is σ = 28749364. Its totient is φ = 28385136.

The previous prime is 28567247. The next prime is 28567267. The reversal of 28567249 is 94276582.

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 7700625 + 20866624 = 2775^2 + 4568^2 .

It is a cyclic number.

It is not a de Polignac number, because 28567249 - 2¹ = 28567247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28567243) 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, 90822 + ... + 91135.

It is an arithmetic number, because the mean of its divisors is an integer number (7187341).

Almost surely, 2^28567249 is an apocalyptic number.

It is an amenable number.

28567249 is a deficient number, since it is larger than the sum of its proper divisors (182115).

28567249 is a wasteful number, since it uses less digits than its factorization.

28567249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182114.

The product of its digits is 241920, while the sum is 43.

The square root of 28567249 is about 5344.8338608417. The cubic root of 28567249 is about 305.6958010423.

The spelling of 28567249 in words is "twenty-eight million, five hundred sixty-seven thousand, two hundred forty-nine".