40443979212 has 192 divisors, whose sum is σ = 131799306240. Its totient is φ = 10439476992.

The previous prime is 40443979211. The next prime is 40443979223. The reversal of 40443979212 is 21297934404.

40443979212 is a `hidden beast` number, since 4 + 0 + 44 + 397 + 9 + 212 = 666.

It is not an unprimeable number, because it can be changed into a prime (40443979211) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 418138 + ... + 505694.

It is an arithmetic number, because the mean of its divisors is an integer number (686454720).

Almost surely, 2^40443979212 is an apocalyptic number.

40443979212 is a gapful number since it is divisible by the number (42) 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 40443979212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65899653120).

40443979212 is an abundant number, since it is smaller than the sum of its proper divisors (91355327028).

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

40443979212 is a wasteful number, since it uses less digits than its factorization.

40443979212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87637 (or 87629 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 40443979212 in words is "forty billion, four hundred forty-three million, nine hundred seventy-nine thousand, two hundred twelve".