40021220008 has 192 divisors, whose sum is σ = 96698448000. Its totient is φ = 15354017280.

The previous prime is 40021219999. The next prime is 40021220047. The reversal of 40021220008 is 80002212004.

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 47 ways as a sum of consecutive naturals, for example, 107295310 + ... + 107295682.

It is an arithmetic number, because the mean of its divisors is an integer number (503637750).

Almost surely, 2^40021220008 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 40021220008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48349224000).

40021220008 is an abundant number, since it is smaller than the sum of its proper divisors (56677227992).

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

40021220008 is a wasteful number, since it uses less digits than its factorization.

40021220008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The spelling of 40021220008 in words is "forty billion, twenty-one million, two hundred twenty thousand, eight".