2820489 has 16 divisors (see below), whose sum is σ = 4387200. Its totient is φ = 1611120.

The previous prime is 2820481. The next prime is 2820491. The reversal of 2820489 is 9840282.

It is not a de Polignac number, because 2820489 - 2³ = 2820481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342 + ... + 2399.

It is an arithmetic number, because the mean of its divisors is an integer number (274200).

2^2820489 is an apocalyptic number.

It is an amenable number.

2820489 is a deficient number, since it is larger than the sum of its proper divisors (1566711).

2820489 is an equidigital number, since it uses as much as digits as its factorization.

2820489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2765 (or 2751 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 2820489 is about 1679.4311536946. The cubic root of 2820489 is about 141.2889301940.

The spelling of 2820489 in words is "two million, eight hundred twenty thousand, four hundred eighty-nine".