2540304240 has 80 divisors (see below), whose sum is σ = 8067046176. Its totient is φ = 660889600.

The previous prime is 2540304233. The next prime is 2540304241. The reversal of 2540304240 is 424030452.

It is a tau number, because it is divible by the number of its divisors (80).

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 2540304240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540304241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119241 + ... + 138920.

Almost surely, 2^2540304240 is an apocalyptic number.

2540304240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2540304240 is an abundant number, since it is smaller than the sum of its proper divisors (5526741936).

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

2540304240 is a wasteful number, since it uses less digits than its factorization.

2540304240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258218 (or 258212 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 2540304240 is about 50401.4309320678. The cubic root of 2540304240 is about 1364.4634636758.

Adding to 2540304240 its reverse (424030452), we get a palindrome (2964334692).

The spelling of 2540304240 in words is "two billion, five hundred forty million, three hundred four thousand, two hundred forty".