3943922684640 has 192 divisors, whose sum is σ = 12644313337152. Its totient is φ = 1033054617600.

The previous prime is 3943922684621. The next prime is 3943922684671. The reversal of 3943922684640 is 464862293493.

It is a super-2 number, since 2×3943922684640² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 21370360 + ... + 21554120.

It is an arithmetic number, because the mean of its divisors is an integer number (65855798631).

Almost surely, 2^{3943922684640} is an apocalyptic number.

3943922684640 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 3943922684640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6322156668576).

3943922684640 is an abundant number, since it is smaller than the sum of its proper divisors (8700390652512).

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

3943922684640 is a wasteful number, since it uses less digits than its factorization.

3943922684640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184573 (or 184565 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 60.

The spelling of 3943922684640 in words is "three trillion, nine hundred forty-three billion, nine hundred twenty-two million, six hundred eighty-four thousand, six hundred forty".