9689908878 has 192 divisors, whose sum is σ = 24933242880. Its totient is φ = 2766500352.

The previous prime is 9689908861. The next prime is 9689909023. The reversal of 9689908878 is 8788099869.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 85751350 + ... + 85751462.

It is an arithmetic number, because the mean of its divisors is an integer number (129860640).

Almost surely, 2^9689908878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9689908878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12466621440).

9689908878 is an abundant number, since it is smaller than the sum of its proper divisors (15243334002).

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

9689908878 is a wasteful number, since it uses less digits than its factorization.

9689908878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 72.

The square root of 9689908878 is about 98437.3347770042. The cubic root of 9689908878 is about 2131.9314240668.

The spelling of 9689908878 in words is "nine billion, six hundred eighty-nine million, nine hundred eight thousand, eight hundred seventy-eight".