28842247 has 8 divisors (see below), whose sum is σ = 34697600. Its totient is φ = 23420664.

The previous prime is 28842241. The next prime is 28842287. The reversal of 28842247 is 74224882.

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 28842247 - 2⁷ = 28842119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28842241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108297 + ... + 108562.

It is an arithmetic number, because the mean of its divisors is an integer number (4337200).

Almost surely, 2^28842247 is an apocalyptic number.

28842247 is a deficient number, since it is larger than the sum of its proper divisors (5855353).

28842247 is a wasteful number, since it uses less digits than its factorization.

28842247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216885.

The product of its digits is 57344, while the sum is 37.

The square root of 28842247 is about 5370.4978353966. The cubic root of 28842247 is about 306.6735806307.

The spelling of 28842247 in words is "twenty-eight million, eight hundred forty-two thousand, two hundred forty-seven".