9864890 has 32 divisors (see below), whose sum is σ = 20684160. Its totient is φ = 3317184.

The previous prime is 9864889. The next prime is 9864937. The reversal of 9864890 is 984689.

9864890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2381 + ... + 5039.

It is an arithmetic number, because the mean of its divisors is an integer number (646380).

Almost surely, 2^9864890 is an apocalyptic number.

9864890 is an abundant number, since it is smaller than the sum of its proper divisors (10819270).

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

9864890 is a wasteful number, since it uses less digits than its factorization.

9864890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 9864890 is about 3140.8422437302. The cubic root of 9864890 is about 214.4687804916.

The spelling of 9864890 in words is "nine million, eight hundred sixty-four thousand, eight hundred ninety".