9859878 has 48 divisors (see below), whose sum is σ = 24928800. Its totient is φ = 2815344.

The previous prime is 9859867. The next prime is 9859897. The reversal of 9859878 is 8789589.

9859878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 9⁵ + 8 + 5 + 9⁷ + 8⁷ + 7⁷ + 8⁷ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5376 + ... + 6972.

It is an arithmetic number, because the mean of its divisors is an integer number (519350).

Almost surely, 2^9859878 is an apocalyptic number.

9859878 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9859878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12464400).

9859878 is an abundant number, since it is smaller than the sum of its proper divisors (15068922).

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

9859878 is a wasteful number, since it uses less digits than its factorization.

9859878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1609 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 9859878 is about 3140.0442672039. The cubic root of 9859878 is about 214.4324530170.

The spelling of 9859878 in words is "nine million, eight hundred fifty-nine thousand, eight hundred seventy-eight".