2520403640 has 16 divisors (see below), whose sum is σ = 5670908280. Its totient is φ = 1008161440.

The previous prime is 2520403609. The next prime is 2520403643. The reversal of 2520403640 is 463040252.

2520403640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520403643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31505006 + ... + 31505085.

Almost surely, 2^2520403640 is an apocalyptic number.

2520403640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2520403640 is an abundant number, since it is smaller than the sum of its proper divisors (3150504640).

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

2520403640 is a wasteful number, since it uses less digits than its factorization.

2520403640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63010102 (or 63010098 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 2520403640 is about 50203.6217817002. The cubic root of 2520403640 is about 1360.8910754954.

Adding to 2520403640 its reverse (463040252), we get a palindrome (2983443892).

The spelling of 2520403640 in words is "two billion, five hundred twenty million, four hundred three thousand, six hundred forty".