3870686 has 4 divisors (see below), whose sum is σ = 5806032. Its totient is φ = 1935342.

The previous prime is 3870667. The next prime is 3870689. The reversal of 3870686 is 6860783.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×3870686² = 29964420221192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3870689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 967670 + ... + 967673.

It is an arithmetic number, because the mean of its divisors is an integer number (1451508).

Almost surely, 2^3870686 is an apocalyptic number.

3870686 is a deficient number, since it is larger than the sum of its proper divisors (1935346).

3870686 is a wasteful number, since it uses less digits than its factorization.

3870686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935345.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 3870686 is about 1967.4059062634. The cubic root of 3870686 is about 157.0107231644.

The spelling of 3870686 in words is "three million, eight hundred seventy thousand, six hundred eighty-six".