2028609 has 24 divisors (see below), whose sum is σ = 3304704. Its totient is φ = 1188000.

The previous prime is 2028601. The next prime is 2028617. The reversal of 2028609 is 9068202.

It is an interprime number because it is at equal distance from previous prime (2028601) and next prime (2028617).

It is not a de Polignac number, because 2028609 - 2³ = 2028601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2028601) 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, 2739 + ... + 3399.

It is an arithmetic number, because the mean of its divisors is an integer number (137696).

2^2028609 is an apocalyptic number.

It is an amenable number.

2028609 is a deficient number, since it is larger than the sum of its proper divisors (1276095).

2028609 is a wasteful number, since it uses less digits than its factorization.

2028609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709 (or 706 counting only the distinct ones).

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

The square root of 2028609 is about 1424.2924559233. The cubic root of 2028609 is about 126.5900144112.

The spelling of 2028609 in words is "two million, twenty-eight thousand, six hundred nine".