6645288 has 96 divisors (see below), whose sum is σ = 19202400. Its totient is φ = 1904256.

The previous prime is 6645259. The next prime is 6645293. The reversal of 6645288 is 8825466.

It is a Harshad number since it is a multiple of its sum of digits (39).

Its product of digits (92160) is a multiple of the sum of its prime divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112603 + ... + 112661.

It is an arithmetic number, because the mean of its divisors is an integer number (200025).

Almost surely, 2^6645288 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 6645288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9601200).

6645288 is an abundant number, since it is smaller than the sum of its proper divisors (12557112).

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

6645288 is a wasteful number, since it uses less digits than its factorization.

6645288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 96 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 6645288 is about 2577.8456121343. The cubic root of 6645288 is about 188.0058093874.

It can be divided in two parts, 66 and 45288, that added together give a palindrome (45354).

The spelling of 6645288 in words is "six million, six hundred forty-five thousand, two hundred eighty-eight".