2820609 has 16 divisors (see below), whose sum is σ = 4559040. Its totient is φ = 1709280.

The previous prime is 2820563. The next prime is 2820619. The reversal of 2820609 is 9060282.

It is not a de Polignac number, because 2820609 - 2⁷ = 2820481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (2820619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4452 + ... + 5045.

It is an arithmetic number, because the mean of its divisors is an integer number (284940).

2^2820609 is an apocalyptic number.

It is an amenable number.

2820609 is a deficient number, since it is larger than the sum of its proper divisors (1738431).

2820609 is a wasteful number, since it uses less digits than its factorization.

2820609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9517 (or 9511 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2820609 is about 1679.4668796972. The cubic root of 2820609 is about 141.2909339164.

The spelling of 2820609 in words is "two million, eight hundred twenty thousand, six hundred nine".