7687208720 has 20 divisors (see below), whose sum is σ = 17872760460. Its totient is φ = 3074883456.

The previous prime is 7687208719. The next prime is 7687208723. The reversal of 7687208720 is 278027867.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5937627136 + 1749581584 = 77056^2 + 41828^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (7687208723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48044975 + ... + 48045134.

It is an arithmetic number, because the mean of its divisors is an integer number (893638023).

Almost surely, 2^7687208720 is an apocalyptic number.

It is an amenable number.

7687208720 is an abundant number, since it is smaller than the sum of its proper divisors (10185551740).

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

7687208720 is a wasteful number, since it uses less digits than its factorization.

7687208720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96090122 (or 96090116 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 47.

The square root of 7687208720 is about 87676.7284973613. The cubic root of 7687208720 is about 1973.5867661580.

The spelling of 7687208720 in words is "seven billion, six hundred eighty-seven million, two hundred eight thousand, seven hundred twenty".