2640228008 has 64 divisors (see below), whose sum is σ = 5582545920. Its totient is φ = 1160267200.

The previous prime is 2640228007. The next prime is 2640228013. The reversal of 2640228008 is 8008220462.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2640228007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339443 + ... + 347133.

It is an arithmetic number, because the mean of its divisors is an integer number (87227280).

Almost surely, 2^2640228008 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 2640228008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2791272960).

2640228008 is an abundant number, since it is smaller than the sum of its proper divisors (2942317912).

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

2640228008 is a wasteful number, since it uses less digits than its factorization.

2640228008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7838 (or 7834 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 2640228008 is about 51383.1490665958. The cubic root of 2640228008 is about 1382.1244335381.

The spelling of 2640228008 in words is "two billion, six hundred forty million, two hundred twenty-eight thousand, eight".