9971424 has 60 divisors (see below), whose sum is σ = 29333304. Its totient is φ = 3322944.

The previous prime is 9971417. The next prime is 9971441. The reversal of 9971424 is 4241799.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 669 + ... + 4515.

Almost surely, 2^9971424 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 9971424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14666652).

9971424 is an abundant number, since it is smaller than the sum of its proper divisors (19361880).

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

9971424 is a wasteful number, since it uses less digits than its factorization.

9971424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3869 (or 3852 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 9971424 is about 3157.7561653807. The cubic root of 9971424 is about 215.2380561305.

The spelling of 9971424 in words is "nine million, nine hundred seventy-one thousand, four hundred twenty-four".