28282145 has 8 divisors (see below), whose sum is σ = 34001640. Its totient is φ = 22583680.

The previous prime is 28282139. The next prime is 28282147. The reversal of 28282145 is 54128282.

It can be written as a sum of positive squares in 4 ways, for example, as 1697809 + 26584336 = 1303^2 + 5156^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28282145 - 2¹² = 28278049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28282147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2126 + ... + 7815.

It is an arithmetic number, because the mean of its divisors is an integer number (4250205).

Almost surely, 2^28282145 is an apocalyptic number.

It is an amenable number.

28282145 is a deficient number, since it is larger than the sum of its proper divisors (5719495).

28282145 is an equidigital number, since it uses as much as digits as its factorization.

28282145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10515.

The product of its digits is 10240, while the sum is 32.

The square root of 28282145 is about 5318.0959938685. The cubic root of 28282145 is about 304.6754408289.

The spelling of 28282145 in words is "twenty-eight million, two hundred eighty-two thousand, one hundred forty-five".