7929680388 has 144 divisors (see below), whose sum is σ = 22085167104. Its totient is φ = 2206962240.

The previous prime is 7929680333. The next prime is 7929680393. The reversal of 7929680388 is 8830869297.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7267723 + ... + 7268813.

It is an arithmetic number, because the mean of its divisors is an integer number (153369216).

Almost surely, 2^7929680388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7929680388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11042583552).

7929680388 is an abundant number, since it is smaller than the sum of its proper divisors (14155486716).

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

7929680388 is a wasteful number, since it uses less digits than its factorization.

7929680388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 60.

The square root of 7929680388 is about 89048.7528716714. The cubic root of 7929680388 is about 1994.1227783838.

The spelling of 7929680388 in words is "seven billion, nine hundred twenty-nine million, six hundred eighty thousand, three hundred eighty-eight".