3943940 has 96 divisors (see below), whose sum is σ = 11176704. Its totient is φ = 1128960.

The previous prime is 3943939. The next prime is 3943957. The reversal of 3943940 is 493493.

It is a junction number, because it is equal to n+sod(n) for n = 3943897 and 3943906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19922 + ... + 20118.

It is an arithmetic number, because the mean of its divisors is an integer number (116424).

Almost surely, 2^3943940 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 3943940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5588352).

3943940 is an abundant number, since it is smaller than the sum of its proper divisors (7232764).

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

3943940 is a wasteful number, since it uses less digits than its factorization.

3943940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 3943940 is about 1985.9355477961. The cubic root of 3943940 is about 157.9950326911.

It can be divided in two parts, 394 and 3940, that added together give a palindrome (4334).

The spelling of 3943940 in words is "three million, nine hundred forty-three thousand, nine hundred forty".