3940821944 has 16 divisors (see below), whose sum is σ = 7397676000. Its totient is φ = 1968108352.

The previous prime is 3940821931. The next prime is 3940821953. The reversal of 3940821944 is 4491280493.

It is a junction number, because it is equal to n+sod(n) for n = 3940821895 and 3940821904.

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 3 ways as a sum of consecutive naturals, for example, 280544 + ... + 294255.

It is an arithmetic number, because the mean of its divisors is an integer number (462354750).

Almost surely, 2^3940821944 is an apocalyptic number.

It is an amenable number.

3940821944 is a deficient number, since it is larger than the sum of its proper divisors (3456854056).

3940821944 is a wasteful number, since it uses less digits than its factorization.

3940821944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575662 (or 575658 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 3940821944 is about 62775.9662928417. The cubic root of 3940821944 is about 1579.5338506278.

The spelling of 3940821944 in words is "three billion, nine hundred forty million, eight hundred twenty-one thousand, nine hundred forty-four".