2688815780 has 48 divisors (see below), whose sum is σ = 6792804480. Its totient is φ = 873358848.

The previous prime is 2688815749. The next prime is 2688815803. The reversal of 2688815780 is 875188862.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502757 + ... + 508076.

It is an arithmetic number, because the mean of its divisors is an integer number (141516760).

Almost surely, 2^2688815780 is an apocalyptic number.

2688815780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2688815780 is an abundant number, since it is smaller than the sum of its proper divisors (4103988700).

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

2688815780 is a wasteful number, since it uses less digits than its factorization.

2688815780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010868 (or 1010866 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 53.

The square root of 2688815780 is about 51853.7923396158. The cubic root of 2688815780 is about 1390.5513021113.

The spelling of 2688815780 in words is "two billion, six hundred eighty-eight million, eight hundred fifteen thousand, seven hundred eighty".