28357716257 has 8 divisors (see below), whose sum is σ = 30541627200. Its totient is φ = 26174169360.

The previous prime is 28357716251. The next prime is 28357716259. The reversal of 28357716257 is 75261775382.

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 28357716257 - 2⁴ = 28357716241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28357716199 and 28357716208.

It is not an unprimeable number, because it can be changed into a prime (28357716251) 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, 83132 + ... + 252242.

It is an arithmetic number, because the mean of its divisors is an integer number (3817703400).

Almost surely, 2^28357716257 is an apocalyptic number.

It is an amenable number.

28357716257 is a deficient number, since it is larger than the sum of its proper divisors (2183910943).

28357716257 is a wasteful number, since it uses less digits than its factorization.

28357716257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182023.

The product of its digits is 4939200, while the sum is 53.

The spelling of 28357716257 in words is "twenty-eight billion, three hundred fifty-seven million, seven hundred sixteen thousand, two hundred fifty-seven".