9819942 has 32 divisors (see below), whose sum is σ = 22360320. Its totient is φ = 2845920.

The previous prime is 9819913. The next prime is 9819947. The reversal of 9819942 is 2499189.

It is a junction number, because it is equal to n+sod(n) for n = 9819894 and 9819903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9819947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1717 + ... + 4752.

It is an arithmetic number, because the mean of its divisors is an integer number (698760).

Almost surely, 2^9819942 is an apocalyptic number.

9819942 is an abundant number, since it is smaller than the sum of its proper divisors (12540378).

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

9819942 is a wasteful number, since it uses less digits than its factorization.

9819942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6508.

The product of its digits is 46656, while the sum is 42.

The square root of 9819942 is about 3133.6786689129. The cubic root of 9819942 is about 214.1425521221.

The spelling of 9819942 in words is "nine million, eight hundred nineteen thousand, nine hundred forty-two".