28168037 has 2 divisors, whose sum is σ = 28168038. Its totient is φ = 28168036.

The previous prime is 28168009. The next prime is 28168061. The reversal of 28168037 is 73086182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23367556 + 4800481 = 4834^2 + 2191^2 .

It is a cyclic number.

It is not a de Polignac number, because 28168037 - 2¹⁴ = 28151653 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28167988 and 28168006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28168067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14084018 + 14084019.

It is an arithmetic number, because the mean of its divisors is an integer number (14084019).

Almost surely, 2^28168037 is an apocalyptic number.

It is an amenable number.

28168037 is a deficient number, since it is larger than the sum of its proper divisors (1).

28168037 is an equidigital number, since it uses as much as digits as its factorization.

28168037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28168037 is about 5307.3568751310. The cubic root of 28168037 is about 304.2651376011.

The spelling of 28168037 in words is "twenty-eight million, one hundred sixty-eight thousand, thirty-seven".