28285243 has 8 divisors (see below), whose sum is σ = 34027520. Its totient is φ = 22968360.

The previous prime is 28285241. The next prime is 28285253. The reversal of 28285243 is 34258282.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28285243 - 2¹ = 28285241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28285199 and 28285208.

It is not an unprimeable number, because it can be changed into a prime (28285241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106203 + ... + 106468.

It is an arithmetic number, because the mean of its divisors is an integer number (4253440).

Almost surely, 2^28285243 is an apocalyptic number.

28285243 is a deficient number, since it is larger than the sum of its proper divisors (5742277).

28285243 is a wasteful number, since it uses less digits than its factorization.

28285243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212697.

The product of its digits is 30720, while the sum is 34.

The square root of 28285243 is about 5318.3872555503. The cubic root of 28285243 is about 304.6865650447.

The spelling of 28285243 in words is "twenty-eight million, two hundred eighty-five thousand, two hundred forty-three".