7879915868 has 24 divisors (see below), whose sum is σ = 15045890160. Its totient is φ = 3581205120.

The previous prime is 7879915867. The next prime is 7879915933. The reversal of 7879915868 is 8685199787.

It is a junction number, because it is equal to n+sod(n) for n = 7879915798 and 7879915807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7879915861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392048 + ... + 411656.

It is an arithmetic number, because the mean of its divisors is an integer number (626912090).

Almost surely, 2^7879915868 is an apocalyptic number.

It is an amenable number.

7879915868 is a deficient number, since it is larger than the sum of its proper divisors (7165974292).

7879915868 is a wasteful number, since it uses less digits than its factorization.

7879915868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28757 (or 28755 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 68.

The square root of 7879915868 is about 88768.8902037195. The cubic root of 7879915868 is about 1989.9424970969.

The spelling of 7879915868 in words is "seven billion, eight hundred seventy-nine million, nine hundred fifteen thousand, eight hundred sixty-eight".