28441609 has 12 divisors (see below), whose sum is σ = 33225984. Its totient is φ = 24274824.

The previous prime is 28441607. The next prime is 28441631. The reversal of 28441609 is 90614482.

It is not a de Polignac number, because 28441609 - 2¹ = 28441607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28441607) 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 11 ways as a sum of consecutive naturals, for example, 11784 + ... + 13990.

It is an arithmetic number, because the mean of its divisors is an integer number (2768832).

Almost surely, 2^28441609 is an apocalyptic number.

It is an amenable number.

28441609 is a deficient number, since it is larger than the sum of its proper divisors (4784375).

28441609 is a wasteful number, since it uses less digits than its factorization.

28441609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484 (or 2477 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28441609 is about 5333.0675037918. The cubic root of 28441609 is about 305.2469879679.

The spelling of 28441609 in words is "twenty-eight million, four hundred forty-one thousand, six hundred nine".