6913638 has 24 divisors (see below), whose sum is σ = 15264288. Its totient is φ = 2260752.

The previous prime is 6913631. The next prime is 6913649. The reversal of 6913638 is 8363196.

It is a happy number.

6913638 is a `hidden beast` number, since 6 + 9 + 13 + 638 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6913631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2670 + ... + 4577.

It is an arithmetic number, because the mean of its divisors is an integer number (636012).

Almost surely, 2^6913638 is an apocalyptic number.

6913638 is an abundant number, since it is smaller than the sum of its proper divisors (8350650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6913638 is a wasteful number, since it uses less digits than its factorization.

6913638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7308 (or 7305 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 6913638 is about 2629.3797747758. The cubic root of 6913638 is about 190.5031722869.

The spelling of 6913638 in words is "six million, nine hundred thirteen thousand, six hundred thirty-eight".