2688609 has 32 divisors (see below), whose sum is σ = 4552704. Its totient is φ = 1370880.

The previous prime is 2688563. The next prime is 2688611. The reversal of 2688609 is 9068862.

It is not a de Polignac number, because 2688609 - 2¹⁵ = 2655841 is a prime.

2688609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2688629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23737 + ... + 23849.

It is an arithmetic number, because the mean of its divisors is an integer number (142272).

2^2688609 is an apocalyptic number.

It is an amenable number.

2688609 is a deficient number, since it is larger than the sum of its proper divisors (1864095).

2688609 is a wasteful number, since it uses less digits than its factorization.

2688609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 2688609 is about 1639.6978380177. The cubic root of 2688609 is about 139.0515654997.

The spelling of 2688609 in words is "two million, six hundred eighty-eight thousand, six hundred nine".