2600640240 has 160 divisors (see below), whose sum is σ = 8814721536. Its totient is φ = 629038080.

The previous prime is 2600640223. The next prime is 2600640247. The reversal of 2600640240 is 420460062.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2600640240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2600640247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1617517 + ... + 1619123.

Almost surely, 2^2600640240 is an apocalyptic number.

2600640240 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 2600640240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4407360768).

2600640240 is an abundant number, since it is smaller than the sum of its proper divisors (6214081296).

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

2600640240 is a wasteful number, since it uses less digits than its factorization.

2600640240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247 (or 2241 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 2600640240 is about 50996.4728192058. The cubic root of 2600640240 is about 1375.1817262842.

The spelling of 2600640240 in words is "two billion, six hundred million, six hundred forty thousand, two hundred forty".