9987822 has 24 divisors (see below), whose sum is σ = 23305464. Its totient is φ = 3073104.

The previous prime is 9987793. The next prime is 9987827. The reversal of 9987822 is 2287899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9987827) 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 11 ways as a sum of consecutive naturals, for example, 21108 + ... + 21575.

It is an arithmetic number, because the mean of its divisors is an integer number (971061).

Almost surely, 2^9987822 is an apocalyptic number.

9987822 is an abundant number, since it is smaller than the sum of its proper divisors (13317642).

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

9987822 is a wasteful number, since it uses less digits than its factorization.

9987822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42704 (or 42701 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 9987822 is about 3160.3515627221. The cubic root of 9987822 is about 215.3559777925.

The spelling of 9987822 in words is "nine million, nine hundred eighty-seven thousand, eight hundred twenty-two".