28584238225 has 12 divisors (see below), whose sum is σ = 35682342300. Its totient is φ = 22713915200.

The previous prime is 28584238213. The next prime is 28584238247. The reversal of 28584238225 is 52283248582.

It can be written as a sum of positive squares in 6 ways, for example, as 2552674576 + 26031563649 = 50524^2 + 161343^2 .

It is not a de Polignac number, because 28584238225 - 2²⁵ = 28550683793 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3833086 + ... + 3840535.

It is an arithmetic number, because the mean of its divisors is an integer number (2973528525).

Almost surely, 2^28584238225 is an apocalyptic number.

28584238225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28584238225 is a deficient number, since it is larger than the sum of its proper divisors (7098104075).

28584238225 is a wasteful number, since it uses less digits than its factorization.

28584238225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7673780 (or 7673775 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 49.

The spelling of 28584238225 in words is "twenty-eight billion, five hundred eighty-four million, two hundred thirty-eight thousand, two hundred twenty-five".