3840686 has 4 divisors (see below), whose sum is σ = 5761032. Its totient is φ = 1920342.

The previous prime is 3840671. The next prime is 3840689. The reversal of 3840686 is 6860483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6860483 = 7 ⋅980069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960170 + ... + 960173.

It is an arithmetic number, because the mean of its divisors is an integer number (1440258).

Almost surely, 2^3840686 is an apocalyptic number.

3840686 is a deficient number, since it is larger than the sum of its proper divisors (1920346).

3840686 is a wasteful number, since it uses less digits than its factorization.

3840686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920345.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 3840686 is about 1959.7668228644. The cubic root of 3840686 is about 156.6040300887.

The spelling of 3840686 in words is "three million, eight hundred forty thousand, six hundred eighty-six".