6640932 has 12 divisors (see below), whose sum is σ = 15495536. Its totient is φ = 2213640.

The previous prime is 6640927. The next prime is 6640939. The reversal of 6640932 is 2390466.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6640932.

It is not an unprimeable number, because it can be changed into a prime (6640939) 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, 276694 + ... + 276717.

Almost surely, 2^6640932 is an apocalyptic number.

It is an amenable number.

6640932 is an abundant number, since it is smaller than the sum of its proper divisors (8854604).

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

6640932 is a wasteful number, since it uses less digits than its factorization.

6640932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553418 (or 553416 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 6640932 is about 2577.0005820721. Note that the first 3 decimals coincide. The cubic root of 6640932 is about 187.9647210096.

The spelling of 6640932 in words is "six million, six hundred forty thousand, nine hundred thirty-two".