28944005 has 16 divisors (see below), whose sum is σ = 36408960. Its totient is φ = 22047168.

The previous prime is 28943983. The next prime is 28944023. The reversal of 28944005 is 50044982.

It is a cyclic number.

It is not a de Polignac number, because 28944005 - 2⁸ = 28943749 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 33266 + ... + 34124.

It is an arithmetic number, because the mean of its divisors is an integer number (2275560).

Almost surely, 2^28944005 is an apocalyptic number.

It is an amenable number.

28944005 is a deficient number, since it is larger than the sum of its proper divisors (7464955).

28944005 is a wasteful number, since it uses less digits than its factorization.

28944005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 28944005 is about 5379.9632898376. The cubic root of 28944005 is about 307.0338144945.

Adding to 28944005 its reverse (50044982), we get a palindrome (78988987).

The spelling of 28944005 in words is "twenty-eight million, nine hundred forty-four thousand, five".