28659247 has 4 divisors (see below), whose sum is σ = 28671136. Its totient is φ = 28647360.

The previous prime is 28659227. The next prime is 28659259. The reversal of 28659247 is 74295682.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28659247 - 2⁷ = 28659119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28659227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 903 + ... + 7624.

It is an arithmetic number, because the mean of its divisors is an integer number (7167784).

Almost surely, 2^28659247 is an apocalyptic number.

28659247 is a deficient number, since it is larger than the sum of its proper divisors (11889).

28659247 is an equidigital number, since it uses as much as digits as its factorization.

28659247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11888.

The product of its digits is 241920, while the sum is 43.

The square root of 28659247 is about 5353.4331974911. The cubic root of 28659247 is about 306.0236037725.

The spelling of 28659247 in words is "twenty-eight million, six hundred fifty-nine thousand, two hundred forty-seven".