2668210240 has 84 divisors (see below), whose sum is σ = 6420217284. Its totient is φ = 1056219136.

The previous prime is 2668210229. The next prime is 2668210247. The reversal of 2668210240 is 420128662.

It can be written as a sum of positive squares in 6 ways, for example, as 1543546944 + 1124663296 = 39288^2 + 33536^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2668210247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4085754 + ... + 4086406.

Almost surely, 2^2668210240 is an apocalyptic number.

2668210240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2668210240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3210108642).

2668210240 is an abundant number, since it is smaller than the sum of its proper divisors (3752007044).

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

2668210240 is an equidigital number, since it uses as much as digits as its factorization.

2668210240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 2668210240 is about 51654.7213718165. The cubic root of 2668210240 is about 1386.9900605857.

The spelling of 2668210240 in words is "two billion, six hundred sixty-eight million, two hundred ten thousand, two hundred forty".