6918838 has 4 divisors (see below), whose sum is σ = 10378260. Its totient is φ = 3459418.

The previous prime is 6918827. The next prime is 6918839. The reversal of 6918838 is 8388196.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 6918794 and 6918803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6918839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1729708 + ... + 1729711.

It is an arithmetic number, because the mean of its divisors is an integer number (2594565).

Almost surely, 2^6918838 is an apocalyptic number.

6918838 is a deficient number, since it is larger than the sum of its proper divisors (3459422).

6918838 is a wasteful number, since it uses less digits than its factorization.

6918838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459421.

The product of its digits is 82944, while the sum is 43.

The square root of 6918838 is about 2630.3684152605. The cubic root of 6918838 is about 190.5509217853.

The spelling of 6918838 in words is "six million, nine hundred eighteen thousand, eight hundred thirty-eight".