28852225 has 12 divisors (see below), whose sum is σ = 35847036. Its totient is φ = 23036480.

The previous prime is 28852223. The next prime is 28852231. The reversal of 28852225 is 52225882.

It can be written as a sum of positive squares in 6 ways, for example, as 1100401 + 27751824 = 1049^2 + 5268^2 .

It is not a de Polignac number, because 28852225 - 2¹ = 28852223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28852223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18579 + ... + 20071.

It is an arithmetic number, because the mean of its divisors is an integer number (2987253).

It is a Proth number, since it is equal to 1761 ⋅ 2¹⁴ + 1 and 1761 < 2¹⁴.

Almost surely, 2^28852225 is an apocalyptic number.

28852225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28852225 is a deficient number, since it is larger than the sum of its proper divisors (6994811).

28852225 is a wasteful number, since it uses less digits than its factorization.

28852225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276 (or 2271 counting only the distinct ones).

The product of its digits is 25600, while the sum is 34.

The square root of 28852225 is about 5371.4267192246. The cubic root of 28852225 is about 306.7089412158.

The spelling of 28852225 in words is "twenty-eight million, eight hundred fifty-two thousand, two hundred twenty-five".