28796320 has 72 divisors (see below), whose sum is σ = 79160004. Its totient is φ = 9870336.

The previous prime is 28796297. The next prime is 28796321. The reversal of 28796320 is 2369782.

It can be written as a sum of positive squares in 2 ways, for example, as 25684624 + 3111696 = 5068^2 + 1764^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28796320.

It is not an unprimeable number, because it can be changed into a prime (28796321) 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, 6004 + ... + 9676.

Almost surely, 2^28796320 is an apocalyptic number.

28796320 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 28796320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39580002).

28796320 is an abundant number, since it is smaller than the sum of its proper divisors (50363684).

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

28796320 is a wasteful number, since it uses less digits than its factorization.

28796320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702 (or 3687 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 28796320 is about 5366.2202712897. The cubic root of 28796320 is about 306.5107167591.

The spelling of 28796320 in words is "twenty-eight million, seven hundred ninety-six thousand, three hundred twenty".