7872928728 has 32 divisors (see below), whose sum is σ = 22494082560. Its totient is φ = 2249408160.

The previous prime is 7872928669. The next prime is 7872928771. The reversal of 7872928728 is 8278292787.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23431168 + ... + 23431503.

It is an arithmetic number, because the mean of its divisors is an integer number (702940080).

Almost surely, 2^7872928728 is an apocalyptic number.

It is an amenable number.

7872928728 is an abundant number, since it is smaller than the sum of its proper divisors (14621153832).

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

7872928728 is a wasteful number, since it uses less digits than its factorization.

7872928728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46862687 (or 46862683 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 60.

The square root of 7872928728 is about 88729.5256833936. The cubic root of 7872928728 is about 1989.3541609331.

The spelling of 7872928728 in words is "seven billion, eight hundred seventy-two million, nine hundred twenty-eight thousand, seven hundred twenty-eight".