28273771171 has 4 divisors (see below), whose sum is σ = 28274152144. Its totient is φ = 28273390200.

The previous prime is 28273771151. The next prime is 28273771181. The reversal of 28273771171 is 17117737282.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17117737282 = 2 ⋅8558868641.

It is a cyclic number.

It is not a de Polignac number, because 28273771171 - 2⁵ = 28273771139 is a prime.

It is a super-2 number, since 2×28273771171² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28273771111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39015 + ... + 240976.

It is an arithmetic number, because the mean of its divisors is an integer number (7068538036).

Almost surely, 2^28273771171 is an apocalyptic number.

28273771171 is a deficient number, since it is larger than the sum of its proper divisors (380973).

28273771171 is a wasteful number, since it uses less digits than its factorization.

28273771171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380972.

The product of its digits is 230496, while the sum is 46.

The spelling of 28273771171 in words is "twenty-eight billion, two hundred seventy-three million, seven hundred seventy-one thousand, one hundred seventy-one".