28645237 has 2 divisors, whose sum is σ = 28645238. Its totient is φ = 28645236.

The previous prime is 28645229. The next prime is 28645283. The reversal of 28645237 is 73254682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25310961 + 3334276 = 5031^2 + 1826^2 .

It is a cyclic number.

It is not a de Polignac number, because 28645237 - 2³ = 28645229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28645196 and 28645205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28645297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14322618 + 14322619.

It is an arithmetic number, because the mean of its divisors is an integer number (14322619).

Almost surely, 2^28645237 is an apocalyptic number.

It is an amenable number.

28645237 is a deficient number, since it is larger than the sum of its proper divisors (1).

28645237 is an equidigital number, since it uses as much as digits as its factorization.

28645237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 37.

The square root of 28645237 is about 5352.1245314361. The cubic root of 28645237 is about 305.9737293579.

It can be divided in two parts, 28645 and 237, that added together give a palindrome (28882).

The spelling of 28645237 in words is "twenty-eight million, six hundred forty-five thousand, two hundred thirty-seven".