32224640 has 64 divisors (see below), whose sum is σ = 88054560. Its totient is φ = 11046912.

The previous prime is 32224579. The next prime is 32224649. The reversal of 32224640 is 4642223.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32224649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 884 + ... + 8076.

Almost surely, 2^32224640 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 32224640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44027280).

32224640 is an abundant number, since it is smaller than the sum of its proper divisors (55829920).

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

32224640 is an equidigital number, since it uses as much as digits as its factorization.

32224640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7219 (or 7207 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 32224640 is about 5676.6750831803. The cubic root of 32224640 is about 318.2213824395.

Adding to 32224640 its reverse (4642223), we get a palindrome (36866863).

The spelling of 32224640 in words is "thirty-two million, two hundred twenty-four thousand, six hundred forty".