2520640208 has 20 divisors (see below), whose sum is σ = 4904012388. Its totient is φ = 1255088640.

The previous prime is 2520640097. The next prime is 2520640223. The reversal of 2520640208 is 8020460252.

It can be written as a sum of positive squares in 2 ways, for example, as 1125468304 + 1395171904 = 33548^2 + 37352^2 .

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 3 ways as a sum of consecutive naturals, for example, 322991 + ... + 330702.

Almost surely, 2^2520640208 is an apocalyptic number.

It is an amenable number.

2520640208 is a deficient number, since it is larger than the sum of its proper divisors (2383372180).

2520640208 is a wasteful number, since it uses less digits than its factorization.

2520640208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653942 (or 653936 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2520640208 is about 50205.9778114121. The cubic root of 2520640208 is about 1360.9336524333.

The spelling of 2520640208 in words is "two billion, five hundred twenty million, six hundred forty thousand, two hundred eight".