8991232 has 40 divisors (see below), whose sum is σ = 19040076. Its totient is φ = 4227072.

The previous prime is 8991223. The next prime is 8991239. The reversal of 8991232 is 2321998.

It can be written as a sum of positive squares in 2 ways, for example, as 7311616 + 1679616 = 2704^2 + 1296^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8991239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8188 + ... + 9220.

Almost surely, 2^8991232 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 8991232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9520038).

8991232 is an abundant number, since it is smaller than the sum of its proper divisors (10048844).

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

8991232 is a wasteful number, since it uses less digits than its factorization.

8991232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1052 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 8991232 is about 2998.5383105773. The cubic root of 8991232 is about 207.9408115613.

It can be divided in two parts, 8 and 991232, that multiplied together give a square (7929856 = 2816²).

The spelling of 8991232 in words is "eight million, nine hundred ninety-one thousand, two hundred thirty-two".