7688447856 has 80 divisors (see below), whose sum is σ = 22665191200. Its totient is φ = 2493545472.

The previous prime is 7688447827. The next prime is 7688447867. The reversal of 7688447856 is 6587448867.

It is a super-2 number, since 2×7688447856² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7688447793 and 7688447802.

It is a congruent number.

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, 224521 + ... + 256488.

It is an arithmetic number, because the mean of its divisors is an integer number (283314890).

Almost surely, 2^7688447856 is an apocalyptic number.

It is an amenable number.

7688447856 is an abundant number, since it is smaller than the sum of its proper divisors (14976743344).

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

7688447856 is a wasteful number, since it uses less digits than its factorization.

7688447856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481063 (or 481051 counting only the distinct ones).

The product of its digits is 72253440, while the sum is 63.

The square root of 7688447856 is about 87683.7947171540. The cubic root of 7688447856 is about 1973.6928042580.

The spelling of 7688447856 in words is "seven billion, six hundred eighty-eight million, four hundred forty-seven thousand, eight hundred fifty-six".