28645837863 has 16 divisors (see below), whose sum is σ = 40210913280. Its totient is φ = 18089305344.

The previous prime is 28645837841. The next prime is 28645837867. The reversal of 28645837863 is 36873854682.

It is a happy number.

It is not a de Polignac number, because 28645837863 - 2⁶ = 28645837799 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28645837797 and 28645837806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28645837867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369495 + ... + 440247.

It is an arithmetic number, because the mean of its divisors is an integer number (2513182080).

Almost surely, 2^28645837863 is an apocalyptic number.

28645837863 is a deficient number, since it is larger than the sum of its proper divisors (11565075417).

28645837863 is a wasteful number, since it uses less digits than its factorization.

28645837863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77878.

The product of its digits is 46448640, while the sum is 60.

The spelling of 28645837863 in words is "twenty-eight billion, six hundred forty-five million, eight hundred thirty-seven thousand, eight hundred sixty-three".