2808720 has 120 divisors (see below), whose sum is σ = 9749376. Its totient is φ = 724224.

The previous prime is 2808719. The next prime is 2808721. The reversal of 2808720 is 278082.

2808720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2808719) and next prime (2808721).

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (2808721) 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 23 ways as a sum of consecutive naturals, for example, 33799 + ... + 33881.

2^2808720 is an apocalyptic number.

2808720 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 2808720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4874688).

2808720 is an abundant number, since it is smaller than the sum of its proper divisors (6940656).

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

2808720 is a wasteful number, since it uses less digits than its factorization.

2808720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 2808720 is about 1675.9236259448. The cubic root of 2808720 is about 141.0921383594.

The spelling of 2808720 in words is "two million, eight hundred eight thousand, seven hundred twenty".