28847247 has 24 divisors (see below), whose sum is σ = 45537072. Its totient is φ = 16135680.

The previous prime is 28847243. The next prime is 28847279. The reversal of 28847247 is 74274882.

It is not a de Polignac number, because 28847247 - 2² = 28847243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28847199 and 28847208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28847243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1663 + ... + 7775.

It is an arithmetic number, because the mean of its divisors is an integer number (1897378).

Almost surely, 2^28847247 is an apocalyptic number.

28847247 is a deficient number, since it is larger than the sum of its proper divisors (16689825).

28847247 is a wasteful number, since it uses less digits than its factorization.

28847247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6151 (or 6140 counting only the distinct ones).

The product of its digits is 200704, while the sum is 42.

The square root of 28847247 is about 5370.9633214164. The cubic root of 28847247 is about 306.6913009249.

The spelling of 28847247 in words is "twenty-eight million, eight hundred forty-seven thousand, two hundred forty-seven".