28849841 has 4 divisors (see below), whose sum is σ = 28912884. Its totient is φ = 28786800.

The previous prime is 28849829. The next prime is 28849883. The reversal of 28849841 is 14894882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21715600 + 7134241 = 4660^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 28849841 - 2¹⁸ = 28587697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28849792 and 28849801.

It is not an unprimeable number, because it can be changed into a prime (28849801) 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 3 ways as a sum of consecutive naturals, for example, 30830 + ... + 31751.

It is an arithmetic number, because the mean of its divisors is an integer number (7228221).

Almost surely, 2^28849841 is an apocalyptic number.

It is an amenable number.

28849841 is a deficient number, since it is larger than the sum of its proper divisors (63043).

28849841 is an equidigital number, since it uses as much as digits as its factorization.

28849841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63042.

The product of its digits is 147456, while the sum is 44.

The square root of 28849841 is about 5371.2047996702. The cubic root of 28849841 is about 306.7004934068.

The spelling of 28849841 in words is "twenty-eight million, eight hundred forty-nine thousand, eight hundred forty-one".