28966243 has 4 divisors (see below), whose sum is σ = 28978768. Its totient is φ = 28953720.

The previous prime is 28966199. The next prime is 28966247. The reversal of 28966243 is 34266982.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 34266982 = 2 ⋅17133491.

It is a cyclic number.

It is not a de Polignac number, because 28966243 - 2⁹ = 28965731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28966196 and 28966205.

It is not an unprimeable number, because it can be changed into a prime (28966247) 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, 1671 + ... + 7792.

It is an arithmetic number, because the mean of its divisors is an integer number (7244692).

Almost surely, 2^28966243 is an apocalyptic number.

28966243 is a deficient number, since it is larger than the sum of its proper divisors (12525).

28966243 is an equidigital number, since it uses as much as digits as its factorization.

28966243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12524.

The product of its digits is 124416, while the sum is 40.

The square root of 28966243 is about 5382.0296357415. The cubic root of 28966243 is about 307.1124268598.

The spelling of 28966243 in words is "twenty-eight million, nine hundred sixty-six thousand, two hundred forty-three".