3942665944 has 64 divisors (see below), whose sum is σ = 8683536960. Its totient is φ = 1642997760.

The previous prime is 3942665941. The next prime is 3942665983. The reversal of 3942665944 is 4495662493.

It is a happy number.

It is a super-2 number, since 2×3942665944² = 31089229491954822272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3942665891 and 3942665900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3942665941) 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, 725124 + ... + 730540.

It is an arithmetic number, because the mean of its divisors is an integer number (135680265).

Almost surely, 2^3942665944 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 3942665944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4341768480).

3942665944 is an abundant number, since it is smaller than the sum of its proper divisors (4740871016).

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

3942665944 is a wasteful number, since it uses less digits than its factorization.

3942665944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5788 (or 5784 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 52.

The square root of 3942665944 is about 62790.6517245999. The cubic root of 3942665944 is about 1579.7801787864.

The spelling of 3942665944 in words is "three billion, nine hundred forty-two million, six hundred sixty-five thousand, nine hundred forty-four".