2640808 has 16 divisors (see below), whose sum is σ = 5008500. Its totient is φ = 1305216.

The previous prime is 2640779. The next prime is 2640821. The reversal of 2640808 is 8080462.

It can be written as a sum of positive squares in 2 ways, for example, as 2427364 + 213444 = 1558^2 + 462^2 .

2640808 is a modest number, since divided by 808 gives 264 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143 + ... + 2566.

2^2640808 is an apocalyptic number.

It is an amenable number.

2640808 is a deficient number, since it is larger than the sum of its proper divisors (2367692).

2640808 is a wasteful number, since it uses less digits than its factorization.

2640808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804 (or 3800 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 2640808 is about 1625.0563067168. The cubic root of 2640808 is about 138.2225632175. Note that the first 3 decimals are identical.

The spelling of 2640808 in words is "two million, six hundred forty thousand, eight hundred eight".