7877878860 has 24 divisors (see below), whose sum is σ = 22058060976. Its totient is φ = 2100767680.

The previous prime is 7877878843. The next prime is 7877878871. The reversal of 7877878860 is 688787787.

It is a junction number, because it is equal to n+sod(n) for n = 7877878791 and 7877878800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65648931 + ... + 65649050.

It is an arithmetic number, because the mean of its divisors is an integer number (919085874).

Almost surely, 2^7877878860 is an apocalyptic number.

It is an amenable number.

7877878860 is an abundant number, since it is smaller than the sum of its proper divisors (14180182116).

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

7877878860 is a wasteful number, since it uses less digits than its factorization.

7877878860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131297993 (or 131297991 counting only the distinct ones).

The product of its (nonzero) digits is 59006976, while the sum is 66.

The square root of 7877878860 is about 88757.4158028500. The cubic root of 7877878860 is about 1989.7710114198.

The spelling of 7877878860 in words is "seven billion, eight hundred seventy-seven million, eight hundred seventy-eight thousand, eight hundred sixty".