9818742 has 8 divisors (see below), whose sum is σ = 19637496. Its totient is φ = 3272912.

The previous prime is 9818729. The next prime is 9818761. The reversal of 9818742 is 2478189.

It is a sphenic number, since it is the product of 3 distinct primes.

9818742 is an admirable number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9818742.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 818223 + ... + 818234.

It is an arithmetic number, because the mean of its divisors is an integer number (2454687).

Almost surely, 2^9818742 is an apocalyptic number.

9818742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

9818742 is a wasteful number, since it uses less digits than its factorization.

9818742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636462.

The product of its digits is 32256, while the sum is 39.

The square root of 9818742 is about 3133.4871948039. The cubic root of 9818742 is about 214.1338290044.

The spelling of 9818742 in words is "nine million, eight hundred eighteen thousand, seven hundred forty-two".