28133157871 has 24 divisors (see below), whose sum is σ = 36776091744. Its totient is φ = 21291399360.

The previous prime is 28133157859. The next prime is 28133157907. The reversal of 28133157871 is 17875133182.

It is not a de Polignac number, because 28133157871 - 2⁹ = 28133157359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28133157571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 945460 + ... + 974761.

It is an arithmetic number, because the mean of its divisors is an integer number (1532337156).

Almost surely, 2^28133157871 is an apocalyptic number.

28133157871 is a deficient number, since it is larger than the sum of its proper divisors (8642933873).

28133157871 is a wasteful number, since it uses less digits than its factorization.

28133157871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920271 (or 1920264 counting only the distinct ones).

The product of its digits is 282240, while the sum is 46.

The spelling of 28133157871 in words is "twenty-eight billion, one hundred thirty-three million, one hundred fifty-seven thousand, eight hundred seventy-one".