3943618 has 12 divisors (see below), whose sum is σ = 6881382. Its totient is φ = 1690080.

The previous prime is 3943613. The next prime is 3943627. The reversal of 3943618 is 8163493.

It can be written as a sum of positive squares in only one way, i.e., 3869089 + 74529 = 1967^2 + 273^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20023 + ... + 20218.

Almost surely, 2^3943618 is an apocalyptic number.

3943618 is a deficient number, since it is larger than the sum of its proper divisors (2937764).

3943618 is a wasteful number, since it uses less digits than its factorization.

3943618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40257 (or 40250 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 3943618 is about 1985.8544760380. The cubic root of 3943618 is about 157.9907327791.

The spelling of 3943618 in words is "three million, nine hundred forty-three thousand, six hundred eighteen".