3944402836 has 24 divisors (see below), whose sum is σ = 7532128800. Its totient is φ = 1792456800.

The previous prime is 3944402789. The next prime is 3944402863. The reversal of 3944402836 is 6382044493.

It is a junction number, because it is equal to n+sod(n) for n = 3944402792 and 3944402801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215566 + ... + 233146.

It is an arithmetic number, because the mean of its divisors is an integer number (313838700).

Almost surely, 2^3944402836 is an apocalyptic number.

It is an amenable number.

3944402836 is a deficient number, since it is larger than the sum of its proper divisors (3587725964).

3944402836 is a wasteful number, since it uses less digits than its factorization.

3944402836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22695 (or 22693 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 43.

The square root of 3944402836 is about 62804.4810184751. The cubic root of 3944402836 is about 1580.0121288392.

The spelling of 3944402836 in words is "three billion, nine hundred forty-four million, four hundred two thousand, eight hundred thirty-six".