3943540 has 24 divisors (see below), whose sum is σ = 8323560. Its totient is φ = 1569408.

The previous prime is 3943531. The next prime is 3943543. The reversal of 3943540 is 453493.

3943540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 535824 + 3407716 = 732^2 + 1846^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3943499 and 3943508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5014 + ... + 5746.

It is an arithmetic number, because the mean of its divisors is an integer number (346815).

Almost surely, 2^3943540 is an apocalyptic number.

It is an amenable number.

3943540 is an abundant number, since it is smaller than the sum of its proper divisors (4380020).

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

3943540 is a wasteful number, since it uses less digits than its factorization.

3943540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 1009 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 3943540 is about 1985.8348370396. The cubic root of 3943540 is about 157.9896911503.

The spelling of 3943540 in words is "three million, nine hundred forty-three thousand, five hundred forty".