2540813340 has 48 divisors (see below), whose sum is σ = 7661531808. Its totient is φ = 625430784.

The previous prime is 2540813339. The next prime is 2540813377. The reversal of 2540813340 is 433180452.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2540813298 and 2540813307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1627947 + ... + 1629506.

It is an arithmetic number, because the mean of its divisors is an integer number (159615246).

Almost surely, 2^2540813340 is an apocalyptic number.

2540813340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2540813340 is an abundant number, since it is smaller than the sum of its proper divisors (5120718468).

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

2540813340 is a wasteful number, since it uses less digits than its factorization.

2540813340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257478 (or 3257476 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 2540813340 is about 50406.4811309022. The cubic root of 2540813340 is about 1364.5546078701.

Adding to 2540813340 its reverse (433180452), we get a palindrome (2973993792).

The spelling of 2540813340 in words is "two billion, five hundred forty million, eight hundred thirteen thousand, three hundred forty".