2520442540 has 48 divisors (see below), whose sum is σ = 6598980864. Its totient is φ = 785592000.

The previous prime is 2520442537. The next prime is 2520442579. The reversal of 2520442540 is 452440252.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 2520442499 and 2520442508.

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, 816786 + ... + 819865.

It is an arithmetic number, because the mean of its divisors is an integer number (137478768).

Almost surely, 2^2520442540 is an apocalyptic number.

2520442540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2520442540 is an abundant number, since it is smaller than the sum of its proper divisors (4078538324).

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

2520442540 is a wasteful number, since it uses less digits than its factorization.

2520442540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636678 (or 1636676 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 2520442540 is about 50204.0092024531. The cubic root of 2520442540 is about 1360.8980768066.

Adding to 2520442540 its reverse (452440252), we get a palindrome (2972882792).

The spelling of 2520442540 in words is "two billion, five hundred twenty million, four hundred forty-two thousand, five hundred forty".