9861838 has 24 divisors (see below), whose sum is σ = 17392752. Its totient is φ = 4181184.

The previous prime is 9861833. The next prime is 9861847. The reversal of 9861838 is 8381689.

It is a happy number.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 9861794 and 9861803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9861833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9606 + ... + 10582.

It is an arithmetic number, because the mean of its divisors is an integer number (724698).

Almost surely, 2^9861838 is an apocalyptic number.

9861838 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

9861838 is a deficient number, since it is larger than the sum of its proper divisors (7530914).

9861838 is a wasteful number, since it uses less digits than its factorization.

9861838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096 (or 1089 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 9861838 is about 3140.3563492062. The cubic root of 9861838 is about 214.4466607574.

The spelling of 9861838 in words is "nine million, eight hundred sixty-one thousand, eight hundred thirty-eight".