28117083 has 16 divisors (see below), whose sum is σ = 38447136. Its totient is φ = 18270720.

The previous prime is 28117081. The next prime is 28117091. The reversal of 28117083 is 38071182.

Added to its reverse (38071182) it gives a triangular number (66188265 = T₁₁₅₀₅).

It is a happy number.

It is not a de Polignac number, because 28117083 - 2¹ = 28117081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28117083.

It is not an unprimeable number, because it can be changed into a prime (28117081) 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, 28291 + ... + 29267.

It is an arithmetic number, because the mean of its divisors is an integer number (2402946).

Almost surely, 2^28117083 is an apocalyptic number.

28117083 is a deficient number, since it is larger than the sum of its proper divisors (10330053).

28117083 is a wasteful number, since it uses less digits than its factorization.

28117083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 28117083 is about 5302.5543844453. The cubic root of 28117083 is about 304.0815621122.

Adding to 28117083 its reverse (38071182), we get a triangular number (66188265 = T₁₁₅₀₅).

The spelling of 28117083 in words is "twenty-eight million, one hundred seventeen thousand, eighty-three".