28268647 has 8 divisors (see below), whose sum is σ = 30884112. Its totient is φ = 25660800.

The previous prime is 28268623. The next prime is 28268677. The reversal of 28268647 is 74686282.

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

It is not a de Polignac number, because 28268647 - 2⁷ = 28268519 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 (28268677) 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, 8233 + ... + 11149.

It is an arithmetic number, because the mean of its divisors is an integer number (3860514).

Almost surely, 2^28268647 is an apocalyptic number.

28268647 is a deficient number, since it is larger than the sum of its proper divisors (2615465).

28268647 is a wasteful number, since it uses less digits than its factorization.

28268647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809.

The product of its digits is 258048, while the sum is 43.

The square root of 28268647 is about 5316.8267791983. The cubic root of 28268647 is about 304.6269630876.

The spelling of 28268647 in words is "twenty-eight million, two hundred sixty-eight thousand, six hundred forty-seven".