2808638 has 16 divisors (see below), whose sum is σ = 5098464. Its totient is φ = 1132800.

The previous prime is 2808607. The next prime is 2808647. The reversal of 2808638 is 8368082.

It is a junction number, because it is equal to n+sod(n) for n = 2808598 and 2808607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5663 + ... + 6138.

It is an arithmetic number, because the mean of its divisors is an integer number (318654).

2^2808638 is an apocalyptic number.

2808638 is a deficient number, since it is larger than the sum of its proper divisors (2289826).

2808638 is a wasteful number, since it uses less digits than its factorization.

2808638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11827.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 2808638 is about 1675.8991616443. The cubic root of 2808638 is about 141.0907652941.

The spelling of 2808638 in words is "two million, eight hundred eight thousand, six hundred thirty-eight".