40044220032 has 128 divisors (see below), whose sum is σ = 112071398400. Its totient is φ = 12633615360.

The previous prime is 40044220009. The next prime is 40044220037. The reversal of 40044220032 is 23002244004.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 40044219990 and 40044220008.

It is not an unprimeable number, because it can be changed into a prime (40044220037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10847307 + ... + 10850997.

It is an arithmetic number, because the mean of its divisors is an integer number (875557800).

Almost surely, 2^40044220032 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 40044220032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56035699200).

40044220032 is an abundant number, since it is smaller than the sum of its proper divisors (72027178368).

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

40044220032 is a wasteful number, since it uses less digits than its factorization.

40044220032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5214 (or 5202 counting only the distinct ones).

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

Adding to 40044220032 its reverse (23002244004), we get a palindrome (63046464036).

The spelling of 40044220032 in words is "forty billion, forty-four million, two hundred twenty thousand, thirty-two".