9867870 has 48 divisors (see below), whose sum is σ = 25985232. Its totient is φ = 2597760.

The previous prime is 9867853. The next prime is 9867883. The reversal of 9867870 is 787689.

9867870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

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, 6810 + ... + 8130.

It is an arithmetic number, because the mean of its divisors is an integer number (541359).

Almost surely, 2^9867870 is an apocalyptic number.

9867870 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9867870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12992616).

9867870 is an abundant number, since it is smaller than the sum of its proper divisors (16117362).

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

9867870 is a wasteful number, since it uses less digits than its factorization.

9867870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417 (or 1414 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 9867870 is about 3141.3166029549. The cubic root of 9867870 is about 214.4903739955.

The spelling of 9867870 in words is "nine million, eight hundred sixty-seven thousand, eight hundred seventy".