2640234240 has 432 divisors, whose sum is σ = 10809489600. Its totient is φ = 582156288.

The previous prime is 2640234229. The next prime is 2640234241. The reversal of 2640234240 is 424320462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640234241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2337996 + ... + 2339124.

Almost surely, 2^2640234240 is an apocalyptic number.

2640234240 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 2640234240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5404744800).

2640234240 is an abundant number, since it is smaller than the sum of its proper divisors (8169255360).

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

2640234240 is a wasteful number, since it uses less digits than its factorization.

2640234240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192 (or 1175 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 2640234240 is about 51383.2097090090. The cubic root of 2640234240 is about 1382.1255209938.

The spelling of 2640234240 in words is "two billion, six hundred forty million, two hundred thirty-four thousand, two hundred forty".