32220040440 has 128 divisors (see below), whose sum is σ = 110528064000. Its totient is φ = 7360624128.

The previous prime is 32220040403. The next prime is 32220040451. The reversal of 32220040440 is 4404002223.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1728691 + ... + 1747229.

It is an arithmetic number, because the mean of its divisors is an integer number (863500500).

Almost surely, 2^32220040440 is an apocalyptic number.

32220040440 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 32220040440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55264032000).

32220040440 is an abundant number, since it is smaller than the sum of its proper divisors (78308023560).

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

32220040440 is a wasteful number, since it uses less digits than its factorization.

32220040440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20629 (or 20625 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 32220040440 its reverse (4404002223), we get a palindrome (36624042663).

The spelling of 32220040440 in words is "thirty-two billion, two hundred twenty million, forty thousand, four hundred forty".