2680638 has 8 divisors (see below), whose sum is σ = 5361288. Its totient is φ = 893544.

The previous prime is 2680631. The next prime is 2680661. The reversal of 2680638 is 8360862.

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

2680638 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2680599 and 2680608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2680631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223381 + ... + 223392.

It is an arithmetic number, because the mean of its divisors is an integer number (670161).

2^2680638 is an apocalyptic number.

2680638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2680638 is a wasteful number, since it uses less digits than its factorization.

2680638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446778.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 2680638 is about 1637.2654030425. The cubic root of 2680638 is about 138.9140126876.

The spelling of 2680638 in words is "two million, six hundred eighty thousand, six hundred thirty-eight".