9861630 has 16 divisors (see below), whose sum is σ = 23667984. Its totient is φ = 2629760.

The previous prime is 9861629. The next prime is 9861637. The reversal of 9861630 is 361689.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 9861591 and 9861600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9861637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164331 + ... + 164390.

It is an arithmetic number, because the mean of its divisors is an integer number (1479249).

Almost surely, 2^9861630 is an apocalyptic number.

9861630 is an abundant number, since it is smaller than the sum of its proper divisors (13806354).

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

9861630 is a wasteful number, since it uses less digits than its factorization.

9861630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328731.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 9861630 is about 3140.3232317709. The cubic root of 9861630 is about 214.4451530865.

The spelling of 9861630 in words is "nine million, eight hundred sixty-one thousand, six hundred thirty".