28444411 has 4 divisors (see below), whose sum is σ = 28981152. Its totient is φ = 27907672.

The previous prime is 28444393. The next prime is 28444421. The reversal of 28444411 is 11444482.

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

It is a cyclic number.

It is not a de Polignac number, because 28444411 - 2¹¹ = 28442363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28444411.

It is not an unprimeable number, because it can be changed into a prime (28444421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268291 + ... + 268396.

It is an arithmetic number, because the mean of its divisors is an integer number (7245288).

Almost surely, 2^28444411 is an apocalyptic number.

28444411 is a deficient number, since it is larger than the sum of its proper divisors (536741).

28444411 is an equidigital number, since it uses as much as digits as its factorization.

28444411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536740.

The product of its digits is 4096, while the sum is 28.

The square root of 28444411 is about 5333.3301979157. The cubic root of 28444411 is about 305.2570117090.

Adding to 28444411 its reverse (11444482), we get a palindrome (39888893).

The spelling of 28444411 in words is "twenty-eight million, four hundred forty-four thousand, four hundred eleven".