6647936 has 32 divisors (see below), whose sum is σ = 13366080. Its totient is φ = 3293440.

The previous prime is 6647923. The next prime is 6647939. The reversal of 6647936 is 6397466.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 6647893 and 6647902.

It is not an unprimeable number, because it can be changed into a prime (6647939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21221 + ... + 21531.

It is an arithmetic number, because the mean of its divisors is an integer number (417690).

Almost surely, 2^6647936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6647936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6683040).

6647936 is an abundant number, since it is smaller than the sum of its proper divisors (6718144).

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

6647936 is a wasteful number, since it uses less digits than its factorization.

6647936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 480 counting only the distinct ones).

The product of its digits is 163296, while the sum is 41.

The square root of 6647936 is about 2578.3591681533. The cubic root of 6647936 is about 188.0307781207.

The spelling of 6647936 in words is "six million, six hundred forty-seven thousand, nine hundred thirty-six".