2681638 has 8 divisors (see below), whose sum is σ = 4052232. Its totient is φ = 1330896.

The previous prime is 2681617. The next prime is 2681663. The reversal of 2681638 is 8361862.

2681638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4620 + ... + 5167.

It is an arithmetic number, because the mean of its divisors is an integer number (506529).

2^2681638 is an apocalyptic number.

2681638 is a deficient number, since it is larger than the sum of its proper divisors (1370594).

2681638 is a wasteful number, since it uses less digits than its factorization.

2681638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9926.

The product of its digits is 13824, while the sum is 34.

The square root of 2681638 is about 1637.5707618299. The cubic root of 2681638 is about 138.9312842902.

The spelling of 2681638 in words is "two million, six hundred eighty-one thousand, six hundred thirty-eight".