2640253320 has 192 divisors, whose sum is σ = 9107017920. Its totient is φ = 687585024.

The previous prime is 2640253309. The next prime is 2640253331. The reversal of 2640253320 is 233520462.

It is an interprime number because it is at equal distance from previous prime (2640253309) and next prime (2640253331).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 414802 + ... + 421118.

It is an arithmetic number, because the mean of its divisors is an integer number (47432385).

Almost surely, 2^2640253320 is an apocalyptic number.

2640253320 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 2640253320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4553508960).

2640253320 is an abundant number, since it is smaller than the sum of its proper divisors (6466764600).

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

2640253320 is a wasteful number, since it uses less digits than its factorization.

2640253320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386 (or 6370 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 2640253320 is about 51383.3953724352. The cubic root of 2640253320 is about 1382.1288503564.

Adding to 2640253320 its reverse (233520462), we get a palindrome (2873773782).

The spelling of 2640253320 in words is "two billion, six hundred forty million, two hundred fifty-three thousand, three hundred twenty".