28828243 has 4 divisors (see below), whose sum is σ = 30524040. Its totient is φ = 27132448.

The previous prime is 28828231. The next prime is 28828259. The reversal of 28828243 is 34282882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34282882 = 2 ⋅17141441.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28828243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28828213) 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, 847873 + ... + 847906.

It is an arithmetic number, because the mean of its divisors is an integer number (7631010).

Almost surely, 2^28828243 is an apocalyptic number.

28828243 is a deficient number, since it is larger than the sum of its proper divisors (1695797).

28828243 is a wasteful number, since it uses less digits than its factorization.

28828243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695796.

The product of its digits is 49152, while the sum is 37.

The square root of 28828243 is about 5369.1938873540. The cubic root of 28828243 is about 306.6239387277.

The spelling of 28828243 in words is "twenty-eight million, eight hundred twenty-eight thousand, two hundred forty-three".