28872857173 has 16 divisors (see below), whose sum is σ = 29299132800. Its totient is φ = 28449748800.

The previous prime is 28872857161. The next prime is 28872857177. The reversal of 28872857173 is 37175827882.

It is a cyclic number.

It is not a de Polignac number, because 28872857173 - 2⁵ = 28872857141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28872857177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34828123 + ... + 34828951.

It is an arithmetic number, because the mean of its divisors is an integer number (1831195800).

Almost surely, 2^28872857173 is an apocalyptic number.

It is an amenable number.

28872857173 is a deficient number, since it is larger than the sum of its proper divisors (426275627).

28872857173 is a wasteful number, since it uses less digits than its factorization.

28872857173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172.

The product of its digits is 10536960, while the sum is 58.

The spelling of 28872857173 in words is "twenty-eight billion, eight hundred seventy-two million, eight hundred fifty-seven thousand, one hundred seventy-three".