2640684008 has 32 divisors (see below), whose sum is σ = 5072548800. Its totient is φ = 1288078848.

The previous prime is 2640683999. The next prime is 2640684019. The reversal of 2640684008 is 8004860462.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 311960 + ... + 320312.

It is an arithmetic number, because the mean of its divisors is an integer number (158517150).

Almost surely, 2^2640684008 is an apocalyptic number.

It is an amenable number.

2640684008 is a deficient number, since it is larger than the sum of its proper divisors (2431864792).

2640684008 is a wasteful number, since it uses less digits than its factorization.

2640684008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9321 (or 9317 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 2640684008 is about 51387.5861273907. The cubic root of 2640684008 is about 1382.2039989468.

The spelling of 2640684008 in words is "two billion, six hundred forty million, six hundred eighty-four thousand, eight".