2640597260 has 72 divisors (see below), whose sum is σ = 6487069680. Its totient is φ = 900230016.

The previous prime is 2640597247. The next prime is 2640597283. The reversal of 2640597260 is 627950462.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167894 + ... + 182946.

It is an arithmetic number, because the mean of its divisors is an integer number (90098190).

Almost surely, 2^2640597260 is an apocalyptic number.

2640597260 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 2640597260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3243534840).

2640597260 is an abundant number, since it is smaller than the sum of its proper divisors (3846472420).

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

2640597260 is a wasteful number, since it uses less digits than its factorization.

2640597260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15255 (or 15246 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 2640597260 is about 51386.7420644664. The cubic root of 2640597260 is about 1382.1888633803.

The spelling of 2640597260 in words is "two billion, six hundred forty million, five hundred ninety-seven thousand, two hundred sixty".