28443255717 has 8 divisors (see below), whose sum is σ = 38949323296. Its totient is φ = 18449679312.

The previous prime is 28443255707. The next prime is 28443255719. The reversal of 28443255717 is 71755234482.

It is a happy number.

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

It is not a de Polignac number, because 28443255717 - 2⁸ = 28443255461 is a prime.

It is a super-3 number, since 3×28443255717³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28443255719) 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, 128122663 + ... + 128122884.

It is an arithmetic number, because the mean of its divisors is an integer number (4868665412).

Almost surely, 2^28443255717 is an apocalyptic number.

It is an amenable number.

28443255717 is a deficient number, since it is larger than the sum of its proper divisors (10506067579).

28443255717 is a wasteful number, since it uses less digits than its factorization.

28443255717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256245587.

The product of its digits is 1881600, while the sum is 48.

The spelling of 28443255717 in words is "twenty-eight billion, four hundred forty-three million, two hundred fifty-five thousand, seven hundred seventeen".