2620728688 has 20 divisors (see below), whose sum is σ = 5098914720. Its totient is φ = 1304879744.

The previous prime is 2620728661. The next prime is 2620728731. The reversal of 2620728688 is 8868270262.

It is a super-2 number, since 2×2620728688² = 13736437712212402688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338845 + ... + 346492.

It is an arithmetic number, because the mean of its divisors is an integer number (254945736).

Almost surely, 2^2620728688 is an apocalyptic number.

It is an amenable number.

2620728688 is a deficient number, since it is larger than the sum of its proper divisors (2478186032).

2620728688 is a wasteful number, since it uses less digits than its factorization.

2620728688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685584 (or 685578 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 49.

The square root of 2620728688 is about 51193.0531224697. The cubic root of 2620728688 is about 1378.7134771837.

The spelling of 2620728688 in words is "two billion, six hundred twenty million, seven hundred twenty-eight thousand, six hundred eighty-eight".