8909472 has 144 divisors (see below), whose sum is σ = 28153440. Its totient is φ = 2449920.

The previous prime is 8909449. The next prime is 8909473. The reversal of 8909472 is 2749098.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 8909472.

It is not an unprimeable number, because it can be changed into a prime (8909473) 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 23 ways as a sum of consecutive naturals, for example, 150979 + ... + 151037.

It is an arithmetic number, because the mean of its divisors is an integer number (195510).

Almost surely, 2^8909472 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 8909472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14076720).

8909472 is an abundant number, since it is smaller than the sum of its proper divisors (19243968).

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

8909472 is a wasteful number, since it uses less digits than its factorization.

8909472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 8909472 is about 2984.8738666818. The cubic root of 8909472 is about 207.3086017538.

The spelling of 8909472 in words is "eight million, nine hundred nine thousand, four hundred seventy-two".