28856243 has 12 divisors (see below), whose sum is σ = 31688280. Its totient is φ = 26260416.

The previous prime is 28856209. The next prime is 28856273. The reversal of 28856243 is 34265882.

It is not a de Polignac number, because 28856243 - 2¹⁰ = 28855219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28856197 and 28856206.

It is not an unprimeable number, because it can be changed into a prime (28856273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11168 + ... + 13506.

It is an arithmetic number, because the mean of its divisors is an integer number (2640690).

Almost surely, 2^28856243 is an apocalyptic number.

28856243 is a deficient number, since it is larger than the sum of its proper divisors (2832037).

28856243 is a wasteful number, since it uses less digits than its factorization.

28856243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438 (or 2425 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 28856243 is about 5371.8007222904. The cubic root of 28856243 is about 306.7231781227.

The spelling of 28856243 in words is "twenty-eight million, eight hundred fifty-six thousand, two hundred forty-three".