28171943 has 8 divisors (see below), whose sum is σ = 28740096. Its totient is φ = 27609400.

The previous prime is 28171939. The next prime is 28171951. The reversal of 28171943 is 34917182.

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 28171943 - 2² = 28171939 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 (28171903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9578 + ... + 12168.

It is an arithmetic number, because the mean of its divisors is an integer number (3592512).

Almost surely, 2^28171943 is an apocalyptic number.

28171943 is a deficient number, since it is larger than the sum of its proper divisors (568153).

28171943 is a wasteful number, since it uses less digits than its factorization.

28171943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805.

The product of its digits is 12096, while the sum is 35.

The square root of 28171943 is about 5307.7248421522. The cubic root of 28171943 is about 304.2792008778.

The spelling of 28171943 in words is "twenty-eight million, one hundred seventy-one thousand, nine hundred forty-three".