6645232 has 40 divisors (see below), whose sum is σ = 14878512. Its totient is φ = 2841600.

The previous prime is 6645227. The next prime is 6645259. The reversal of 6645232 is 2325466.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6645232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1882 + ... + 4102.

Almost surely, 2^6645232 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 6645232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7439256).

6645232 is an abundant number, since it is smaller than the sum of its proper divisors (8233280).

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

6645232 is a wasteful number, since it uses less digits than its factorization.

6645232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257 (or 2251 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 6645232 is about 2577.8347503283. The cubic root of 6645232 is about 188.0052812761.

The spelling of 6645232 in words is "six million, six hundred forty-five thousand, two hundred thirty-two".