2808020 has 12 divisors (see below), whose sum is σ = 5896884. Its totient is φ = 1123200.

The previous prime is 2808017. The next prime is 2808023. The reversal of 2808020 is 208082.

2808020 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 (2808017) and next prime (2808023).

It can be written as a sum of positive squares in 2 ways, for example, as 386884 + 2421136 = 622^2 + 1556^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 140401 = 2808020 / (2 + 8 + 0 + 8 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 2807983 and 2808001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2808023) 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 3 ways as a sum of consecutive naturals, for example, 70181 + ... + 70220.

It is an arithmetic number, because the mean of its divisors is an integer number (491407).

2^2808020 is an apocalyptic number.

2808020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2808020 is an abundant number, since it is smaller than the sum of its proper divisors (3088864).

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

2808020 is a wasteful number, since it uses less digits than its factorization.

2808020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140410 (or 140408 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 2808020 is about 1675.7147728656. The cubic root of 2808020 is about 141.0804162104.

The spelling of 2808020 in words is "two million, eight hundred eight thousand, twenty".