9857442 has 64 divisors (see below), whose sum is σ = 23814144. Its totient is φ = 2661120.

The previous prime is 9857423. The next prime is 9857443. The reversal of 9857442 is 2447589.

It is a self number, because there is not a number n which added to its sum of digits gives 9857442.

It is not an unprimeable number, because it can be changed into a prime (9857443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87178 + ... + 87290.

It is an arithmetic number, because the mean of its divisors is an integer number (372096).

Almost surely, 2^9857442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9857442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11907072).

9857442 is an abundant number, since it is smaller than the sum of its proper divisors (13956702).

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

9857442 is a wasteful number, since it uses less digits than its factorization.

9857442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223.

The product of its digits is 80640, while the sum is 39.

The square root of 9857442 is about 3139.6563506218. The cubic root of 9857442 is about 214.4147922008.

The spelling of 9857442 in words is "nine million, eight hundred fifty-seven thousand, four hundred forty-two".