6718438 has 16 divisors (see below), whose sum is σ = 11070720. Its totient is φ = 3043656.

The previous prime is 6718399. The next prime is 6718441. The reversal of 6718438 is 8348176.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6718397 and 6718406.

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, 2970 + ... + 4717.

It is an arithmetic number, because the mean of its divisors is an integer number (691920).

Almost surely, 2^6718438 is an apocalyptic number.

6718438 is a deficient number, since it is larger than the sum of its proper divisors (4352282).

6718438 is a wasteful number, since it uses less digits than its factorization.

6718438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7731.

The product of its digits is 32256, while the sum is 37.

The square root of 6718438 is about 2591.9949845630. The cubic root of 6718438 is about 188.6931369725.

The spelling of 6718438 in words is "six million, seven hundred eighteen thousand, four hundred thirty-eight".