28718347 has 8 divisors (see below), whose sum is σ = 32854016. Its totient is φ = 24590952.

The previous prime is 28718311. The next prime is 28718353. The reversal of 28718347 is 74381782.

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 28718347 - 2¹⁹ = 28194059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28718387) 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 7 ways as a sum of consecutive naturals, for example, 10408 + ... + 12874.

It is an arithmetic number, because the mean of its divisors is an integer number (4106752).

Almost surely, 2^28718347 is an apocalyptic number.

28718347 is a deficient number, since it is larger than the sum of its proper divisors (4135669).

28718347 is a wasteful number, since it uses less digits than its factorization.

28718347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137.

The product of its digits is 75264, while the sum is 40.

The square root of 28718347 is about 5358.9501770403. The cubic root of 28718347 is about 306.2338160544.

The spelling of 28718347 in words is "twenty-eight million, seven hundred eighteen thousand, three hundred forty-seven".