28268349 has 4 divisors (see below), whose sum is σ = 37691136. Its totient is φ = 18845564.

The previous prime is 28268323. The next prime is 28268351. The reversal of 28268349 is 94386282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28268349 - 2⁷ = 28268221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28268349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28268309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4711389 + ... + 4711394.

It is an arithmetic number, because the mean of its divisors is an integer number (9422784).

Almost surely, 2^28268349 is an apocalyptic number.

It is an amenable number.

28268349 is a deficient number, since it is larger than the sum of its proper divisors (9422787).

28268349 is an equidigital number, since it uses as much as digits as its factorization.

28268349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9422786.

The product of its digits is 165888, while the sum is 42.

The square root of 28268349 is about 5316.7987548900. The cubic root of 28268349 is about 304.6258926537.

It can be divided in two parts, 2826 and 8349, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 28268349 in words is "twenty-eight million, two hundred sixty-eight thousand, three hundred forty-nine".