9391872 has 72 divisors (see below), whose sum is σ = 28583296. Its totient is φ = 2681856.

The previous prime is 9391847. The next prime is 9391873. The reversal of 9391872 is 2781939.

It is a self number, because there is not a number n which added to its sum of digits gives 9391872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9391873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4503 + ... + 6249.

Almost surely, 2^9391872 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 9391872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14291648).

9391872 is an abundant number, since it is smaller than the sum of its proper divisors (19191424).

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

9391872 is a wasteful number, since it uses less digits than its factorization.

9391872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773 (or 1759 counting only the distinct ones).

The product of its digits is 27216, while the sum is 39.

The square root of 9391872 is about 3064.6161260425. The cubic root of 9391872 is about 210.9845829275.

The spelling of 9391872 in words is "nine million, three hundred ninety-one thousand, eight hundred seventy-two".