32231320440 has 128 divisors (see below), whose sum is σ = 105543648000. Its totient is φ = 7809259520.

The previous prime is 32231320439. The next prime is 32231320469. The reversal of 32231320440 is 4402313223.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 32231320440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2764864 + ... + 2776496.

It is an arithmetic number, because the mean of its divisors is an integer number (824559750).

Almost surely, 2^32231320440 is an apocalyptic number.

32231320440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32231320440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52771824000).

32231320440 is an abundant number, since it is smaller than the sum of its proper divisors (73312327560).

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

32231320440 is a wasteful number, since it uses less digits than its factorization.

32231320440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13757 (or 13753 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 32231320440 its reverse (4402313223), we get a palindrome (36633633663).

The spelling of 32231320440 in words is "thirty-two billion, two hundred thirty-one million, three hundred twenty thousand, four hundred forty".