28333225 has 12 divisors (see below), whose sum is σ = 36267520. Its totient is φ = 21934800.

The previous prime is 28333223. The next prime is 28333229. The reversal of 28333225 is 52233382.

It is not a de Polignac number, because 28333225 - 2¹ = 28333223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28333193 and 28333202.

It is not an unprimeable number, because it can be changed into a prime (28333223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17505 + ... + 19054.

Almost surely, 2^28333225 is an apocalyptic number.

28333225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28333225 is a deficient number, since it is larger than the sum of its proper divisors (7934295).

28333225 is a wasteful number, since it uses less digits than its factorization.

28333225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36600 (or 36595 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 28333225 is about 5322.8962980693. The cubic root of 28333225 is about 304.8587539126.

The spelling of 28333225 in words is "twenty-eight million, three hundred thirty-three thousand, two hundred twenty-five".