28008441 has 12 divisors (see below), whose sum is σ = 40504932. Its totient is φ = 18650016.

The previous prime is 28008397. The next prime is 28008443. The reversal of 28008441 is 14480082.

It can be written as a sum of positive squares in 2 ways, for example, as 23040000 + 4968441 = 4800^2 + 2229^2 .

It is not a de Polignac number, because 28008441 - 2¹⁸ = 27746297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28008443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10275 + ... + 12711.

It is an arithmetic number, because the mean of its divisors is an integer number (3375411).

Almost surely, 2^28008441 is an apocalyptic number.

It is an amenable number.

28008441 is a deficient number, since it is larger than the sum of its proper divisors (12496491).

28008441 is a wasteful number, since it uses less digits than its factorization.

28008441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720 (or 3717 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 28008441 is about 5292.3001615555. The cubic root of 28008441 is about 303.6894082260.

The spelling of 28008441 in words is "twenty-eight million, eight thousand, four hundred forty-one".