7871516728 has 8 divisors (see below), whose sum is σ = 14759093880. Its totient is φ = 3935758360.

The previous prime is 7871516717. The next prime is 7871516753. The reversal of 7871516728 is 8276151787.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491969788 + ... + 491969803.

It is an arithmetic number, because the mean of its divisors is an integer number (1844886735).

Almost surely, 2^7871516728 is an apocalyptic number.

It is an amenable number.

7871516728 is a deficient number, since it is larger than the sum of its proper divisors (6887577152).

7871516728 is a wasteful number, since it uses less digits than its factorization.

7871516728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983939597 (or 983939593 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 52.

The square root of 7871516728 is about 88721.5685614270. The cubic root of 7871516728 is about 1989.2352244222.

The spelling of 7871516728 in words is "seven billion, eight hundred seventy-one million, five hundred sixteen thousand, seven hundred twenty-eight".