28334320 has 80 divisors (see below), whose sum is σ = 79280640. Its totient is φ = 9199872.

The previous prime is 28334311. The next prime is 28334333. The reversal of 28334320 is 2343382.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9309 + ... + 11971.

It is an arithmetic number, because the mean of its divisors is an integer number (991008).

Almost surely, 2^28334320 is an apocalyptic number.

28334320 is a gapful number since it is divisible by the number (20) 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 28334320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39640320).

28334320 is an abundant number, since it is smaller than the sum of its proper divisors (50946320).

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

28334320 is a wasteful number, since it uses less digits than its factorization.

28334320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702 (or 2696 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 28334320 is about 5322.9991546120. Note that the first 3 decimals coincide. The cubic root of 28334320 is about 304.8626811751.

The spelling of 28334320 in words is "twenty-eight million, three hundred thirty-four thousand, three hundred twenty".