28169793 has 18 divisors (see below), whose sum is σ = 42057522. Its totient is φ = 18168480.

The previous prime is 28169777. The next prime is 28169797. The reversal of 28169793 is 39796182.

It can be written as a sum of positive squares in only one way, i.e., 27123264 + 1046529 = 5208^2 + 1023^2 .

It is not a de Polignac number, because 28169793 - 2⁴ = 28169777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28169797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7021 + ... + 10277.

It is an arithmetic number, because the mean of its divisors is an integer number (2336529).

Almost surely, 2^28169793 is an apocalyptic number.

It is an amenable number.

28169793 is a deficient number, since it is larger than the sum of its proper divisors (13887729).

28169793 is a wasteful number, since it uses less digits than its factorization.

28169793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325 (or 3291 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 28169793 is about 5307.5223032975. The cubic root of 28169793 is about 304.2714601158.

The spelling of 28169793 in words is "twenty-eight million, one hundred sixty-nine thousand, seven hundred ninety-three".