2678638 has 8 divisors (see below), whose sum is σ = 4055832. Its totient is φ = 1326696.

The previous prime is 2678629. The next prime is 2678651. The reversal of 2678638 is 8368762.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2678638.

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, 6045 + ... + 6472.

It is an arithmetic number, because the mean of its divisors is an integer number (506979).

2^2678638 is an apocalyptic number.

2678638 is a deficient number, since it is larger than the sum of its proper divisors (1377194).

2678638 is a wasteful number, since it uses less digits than its factorization.

2678638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12626.

The product of its digits is 96768, while the sum is 40.

The square root of 2678638 is about 1636.6545145509. The cubic root of 2678638 is about 138.8794565920.

The spelling of 2678638 in words is "two million, six hundred seventy-eight thousand, six hundred thirty-eight".