28717157443 has 8 divisors (see below), whose sum is σ = 31215200688. Its totient is φ = 26260404384.

The previous prime is 28717157423. The next prime is 28717157473. The reversal of 28717157443 is 34475171782.

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 28717157443 - 2²¹ = 28715060291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28717157423) 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, 10321096 + ... + 10323877.

It is an arithmetic number, because the mean of its divisors is an integer number (3901900086).

Almost surely, 2^28717157443 is an apocalyptic number.

28717157443 is a deficient number, since it is larger than the sum of its proper divisors (2498043245).

28717157443 is a wasteful number, since it uses less digits than its factorization.

28717157443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20645093.

The product of its digits is 1317120, while the sum is 49.

The spelling of 28717157443 in words is "twenty-eight billion, seven hundred seventeen million, one hundred fifty-seven thousand, four hundred forty-three".