2688438 has 8 divisors (see below), whose sum is σ = 5376888. Its totient is φ = 896144.

The previous prime is 2688421. The next prime is 2688451. The reversal of 2688438 is 8348862.

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

2688438 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2688396 and 2688405.

It is a congruent number.

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, 224031 + ... + 224042.

It is an arithmetic number, because the mean of its divisors is an integer number (672111).

2^2688438 is an apocalyptic number.

2688438 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.

2688438 is a wasteful number, since it uses less digits than its factorization.

2688438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448078.

The product of its digits is 73728, while the sum is 39.

The square root of 2688438 is about 1639.6456934350. The cubic root of 2688438 is about 139.0486174670.

The spelling of 2688438 in words is "two million, six hundred eighty-eight thousand, four hundred thirty-eight".