3938636 has 12 divisors (see below), whose sum is σ = 7422912. Its totient is φ = 1817808.

The previous prime is 3938633. The next prime is 3938639. The reversal of 3938636 is 6368393.

It is an interprime number because it is at equal distance from previous prime (3938633) and next prime (3938639).

It is a self number, because there is not a number n which added to its sum of digits gives 3938636.

It is not an unprimeable number, because it can be changed into a prime (3938633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37820 + ... + 37923.

It is an arithmetic number, because the mean of its divisors is an integer number (618576).

Almost surely, 2^3938636 is an apocalyptic number.

It is an amenable number.

3938636 is a deficient number, since it is larger than the sum of its proper divisors (3484276).

3938636 is a wasteful number, since it uses less digits than its factorization.

3938636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75760 (or 75758 counting only the distinct ones).

The product of its digits is 69984, while the sum is 38.

The square root of 3938636 is about 1984.5997077497. The cubic root of 3938636 is about 157.9241744802.

The spelling of 3938636 in words is "three million, nine hundred thirty-eight thousand, six hundred thirty-six".