28284243 has 32 divisors (see below), whose sum is σ = 44202816. Its totient is φ = 15925248.

The previous prime is 28284241. The next prime is 28284247. The reversal of 28284243 is 34248282.

It is not a de Polignac number, because 28284243 - 2¹ = 28284241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28284241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23955 + ... + 25107.

It is an arithmetic number, because the mean of its divisors is an integer number (1381338).

Almost surely, 2^28284243 is an apocalyptic number.

28284243 is a deficient number, since it is larger than the sum of its proper divisors (15918573).

28284243 is a wasteful number, since it uses less digits than its factorization.

28284243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223.

The product of its digits is 24576, while the sum is 33.

The square root of 28284243 is about 5318.2932412570. The cubic root of 28284243 is about 304.6829743601.

The spelling of 28284243 in words is "twenty-eight million, two hundred eighty-four thousand, two hundred forty-three".