2640435260 has 48 divisors (see below), whose sum is σ = 5776535520. Its totient is φ = 1012930560.

The previous prime is 2640435251. The next prime is 2640435269. The reversal of 2640435260 is 625340462.

2640435260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2640435251) and next prime (2640435269).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640435269) 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, 21092 + ... + 75668.

It is an arithmetic number, because the mean of its divisors is an integer number (120344490).

Almost surely, 2^2640435260 is an apocalyptic number.

2640435260 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 2640435260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2888267760).

2640435260 is an abundant number, since it is smaller than the sum of its proper divisors (3136100260).

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

2640435260 is a wasteful number, since it uses less digits than its factorization.

2640435260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54686 (or 54684 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 2640435260 is about 51385.1657582225. The cubic root of 2640435260 is about 1382.1605971520.

The spelling of 2640435260 in words is "two billion, six hundred forty million, four hundred thirty-five thousand, two hundred sixty".