28489344 has 96 divisors (see below), whose sum is σ = 82130400. Its totient is φ = 8745984.

The previous prime is 28489343. The next prime is 28489361. The reversal of 28489344 is 44398482.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 28489296 and 28489305.

It is not an unprimeable number, because it can be changed into a prime (28489343) 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 11 ways as a sum of consecutive naturals, for example, 64677 + ... + 65115.

It is an arithmetic number, because the mean of its divisors is an integer number (855525).

Almost surely, 2^28489344 is an apocalyptic number.

28489344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28489344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41065200).

28489344 is an abundant number, since it is smaller than the sum of its proper divisors (53641056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28489344 is a wasteful number, since it uses less digits than its factorization.

28489344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 457 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The square root of 28489344 is about 5337.5410068682. The cubic root of 28489344 is about 305.4176630380.

The spelling of 28489344 in words is "twenty-eight million, four hundred eighty-nine thousand, three hundred forty-four".