28344789 has 32 divisors (see below), whose sum is σ = 48230400. Its totient is φ = 16271280.

The previous prime is 28344779. The next prime is 28344793. The reversal of 28344789 is 98744382.

It is not a de Polignac number, because 28344789 - 2⁴ = 28344773 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28344709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3132 + ... + 8154.

It is an arithmetic number, because the mean of its divisors is an integer number (1507200).

Almost surely, 2^28344789 is an apocalyptic number.

It is an amenable number.

28344789 is a deficient number, since it is larger than the sum of its proper divisors (19885611).

28344789 is a wasteful number, since it uses less digits than its factorization.

28344789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5062 (or 5056 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 28344789 is about 5323.9824379876. The cubic root of 28344789 is about 304.9002235666.

The spelling of 28344789 in words is "twenty-eight million, three hundred forty-four thousand, seven hundred eighty-nine".