9879870 has 192 divisors, whose sum is σ = 33094656. Its totient is φ = 1854720.

The previous prime is 9879827. The next prime is 9879871. The reversal of 9879870 is 789789.

9879870 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9879870² = 195223662433800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9879871) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 210187 + ... + 210233.

It is an arithmetic number, because the mean of its divisors is an integer number (172368).

Almost surely, 2^9879870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9879870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16547328).

9879870 is an abundant number, since it is smaller than the sum of its proper divisors (23214786).

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

9879870 is a wasteful number, since it uses less digits than its factorization.

9879870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 9879870 is about 3143.2260497775. The cubic root of 9879870 is about 214.5772837289.

The spelling of 9879870 in words is "nine million, eight hundred seventy-nine thousand, eight hundred seventy".