2540431240 has 64 divisors (see below), whose sum is σ = 5762171520. Its totient is φ = 1008000000.

The previous prime is 2540431237. The next prime is 2540431247. The reversal of 2540431240 is 421340452.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2540431247) 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, 4025725 + ... + 4026355.

It is an arithmetic number, because the mean of its divisors is an integer number (90033930).

Almost surely, 2^2540431240 is an apocalyptic number.

2540431240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2540431240 is an abundant number, since it is smaller than the sum of its proper divisors (3221740280).

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

2540431240 is a wasteful number, since it uses less digits than its factorization.

2540431240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294 (or 1290 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 2540431240 is about 50402.6908011864. The cubic root of 2540431240 is about 1364.4862016310.

Adding to 2540431240 its reverse (421340452), we get a palindrome (2961771692).

It can be divided in two parts, 25404 and 31240, that added together give a square (56644 = 238²).

The spelling of 2540431240 in words is "two billion, five hundred forty million, four hundred thirty-one thousand, two hundred forty".