6628840344 has 144 divisors (see below), whose sum is σ = 20938525920. Its totient is φ = 1889032320.

The previous prime is 6628840331. The next prime is 6628840349. The reversal of 6628840344 is 4430488266.

It is a self number, because there is not a number n which added to its sum of digits gives 6628840344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6628840349) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1483057 + ... + 1487519.

It is an arithmetic number, because the mean of its divisors is an integer number (145406430).

Almost surely, 2^6628840344 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 6628840344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10469262960).

6628840344 is an abundant number, since it is smaller than the sum of its proper divisors (14309685576).

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

6628840344 is a wasteful number, since it uses less digits than its factorization.

6628840344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4910 (or 4896 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The square root of 6628840344 is about 81417.6906083684. The cubic root of 6628840344 is about 1878.5057108968.

The spelling of 6628840344 in words is "six billion, six hundred twenty-eight million, eight hundred forty thousand, three hundred forty-four".