28715347 has 4 divisors (see below), whose sum is σ = 29257200. Its totient is φ = 28173496.

The previous prime is 28715341. The next prime is 28715377. The reversal of 28715347 is 74351782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74351782 = 2 ⋅37175891.

It is a cyclic number.

It is not a de Polignac number, because 28715347 - 2¹¹ = 28713299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28715341) 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 3 ways as a sum of consecutive naturals, for example, 270847 + ... + 270952.

It is an arithmetic number, because the mean of its divisors is an integer number (7314300).

Almost surely, 2^28715347 is an apocalyptic number.

28715347 is a deficient number, since it is larger than the sum of its proper divisors (541853).

28715347 is an equidigital number, since it uses as much as digits as its factorization.

28715347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541852.

The product of its digits is 47040, while the sum is 37.

The square root of 28715347 is about 5358.6702641607. The cubic root of 28715347 is about 306.2231523320.

The spelling of 28715347 in words is "twenty-eight million, seven hundred fifteen thousand, three hundred forty-seven".