28128370173 has 8 divisors (see below), whose sum is σ = 37790787936. Its totient is φ = 18609099600.

The previous prime is 28128370093. The next prime is 28128370199. The reversal of 28128370173 is 37107382182.

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

It is not a de Polignac number, because 28128370173 - 2²⁶ = 28061261309 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28128375173) 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, 35786338 + ... + 35787123.

It is an arithmetic number, because the mean of its divisors is an integer number (4723848492).

Almost surely, 2^28128370173 is an apocalyptic number.

It is an amenable number.

28128370173 is a deficient number, since it is larger than the sum of its proper divisors (9662417763).

28128370173 is a wasteful number, since it uses less digits than its factorization.

28128370173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71573595.

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 28128370173 in words is "twenty-eight billion, one hundred twenty-eight million, three hundred seventy thousand, one hundred seventy-three".