9878656 has 32 divisors (see below), whose sum is σ = 19975680. Its totient is φ = 4865280.

The previous prime is 9878611. The next prime is 9878657. The reversal of 9878656 is 6568789.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8545 + ... + 9631.

It is an arithmetic number, because the mean of its divisors is an integer number (624240).

Almost surely, 2^9878656 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 9878656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9987840).

9878656 is an abundant number, since it is smaller than the sum of its proper divisors (10097024).

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

9878656 is a wasteful number, since it uses less digits than its factorization.

9878656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1160 counting only the distinct ones).

The product of its digits is 725760, while the sum is 49.

The square root of 9878656 is about 3143.0329301488. The cubic root of 9878656 is about 214.5684945615.

The spelling of 9878656 in words is "nine million, eight hundred seventy-eight thousand, six hundred fifty-six".