9981356 has 48 divisors (see below), whose sum is σ = 22740480. Its totient is φ = 3717120.

The previous prime is 9981341. The next prime is 9981359. The reversal of 9981356 is 6531899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981359) 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 15 ways as a sum of consecutive naturals, for example, 6380 + ... + 7788.

It is an arithmetic number, because the mean of its divisors is an integer number (473760).

Almost surely, 2^9981356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9981356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11370240).

9981356 is an abundant number, since it is smaller than the sum of its proper divisors (12759124).

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

9981356 is a wasteful number, since it uses less digits than its factorization.

9981356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454 (or 1452 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 9981356 is about 3159.3284096466. The cubic root of 9981356 is about 215.3094947736.

It can be divided in two parts, 99 and 81356, that multiplied together give a square (8054244 = 2838²).

The spelling of 9981356 in words is "nine million, nine hundred eighty-one thousand, three hundred fifty-six".