9921436 has 12 divisors (see below), whose sum is σ = 19842928. Its totient is φ = 4252032.

The previous prime is 9921409. The next prime is 9921449. The reversal of 9921436 is 6341299.

9921436 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 9⁵ + 9⁷ + 2⁷ + 1 + 4⁷ + 3¹⁴ + 6⁷ .

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, 177141 + ... + 177196.

Almost surely, 2^9921436 is an apocalyptic number.

It is an amenable number.

9921436 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.

9921436 is a wasteful number, since it uses less digits than its factorization.

9921436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354348 (or 354346 counting only the distinct ones).

The product of its digits is 11664, while the sum is 34.

The square root of 9921436 is about 3149.8311065833. The cubic root of 9921436 is about 214.8777816279.

The spelling of 9921436 in words is "nine million, nine hundred twenty-one thousand, four hundred thirty-six".