6911638 has 16 divisors (see below), whose sum is σ = 10936800. Its totient is φ = 3269376.

The previous prime is 6911633. The next prime is 6911647. The reversal of 6911638 is 8361196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6911633) 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 7 ways as a sum of consecutive naturals, for example, 3688 + ... + 5236.

It is an arithmetic number, because the mean of its divisors is an integer number (683550).

Almost surely, 2^6911638 is an apocalyptic number.

6911638 is a deficient number, since it is larger than the sum of its proper divisors (4025162).

6911638 is a wasteful number, since it uses less digits than its factorization.

6911638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671.

The product of its digits is 7776, while the sum is 34.

The square root of 6911638 is about 2628.9994294408. Note that the first 3 decimals coincide. The cubic root of 6911638 is about 190.4848007199.

The spelling of 6911638 in words is "six million, nine hundred eleven thousand, six hundred thirty-eight".