2520505440 has 72 divisors (see below), whose sum is σ = 8601229728. Its totient is φ = 672134400.

The previous prime is 2520505423. The next prime is 2520505447. The reversal of 2520505440 is 445050252.

2520505440 is a `hidden beast` number, since 2 + 520 + 50 + 54 + 40 = 666.

2520505440 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520505447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 873736 + ... + 876615.

It is an arithmetic number, because the mean of its divisors is an integer number (119461524).

Almost surely, 2^2520505440 is an apocalyptic number.

2520505440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2520505440 is an abundant number, since it is smaller than the sum of its proper divisors (6080724288).

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

2520505440 is a wasteful number, since it uses less digits than its factorization.

2520505440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750372 (or 1750361 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 2520505440 is about 50204.6356425380. The cubic root of 2520505440 is about 1360.9093975404.

Adding to 2520505440 its reverse (445050252), we get a palindrome (2965555692).

The spelling of 2520505440 in words is "two billion, five hundred twenty million, five hundred five thousand, four hundred forty".