3831686 has 4 divisors (see below), whose sum is σ = 5747532. Its totient is φ = 1915842.

The previous prime is 3831661. The next prime is 3831689. The reversal of 3831686 is 6861383.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3831689) 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, 957920 + ... + 957923.

It is an arithmetic number, because the mean of its divisors is an integer number (1436883).

Almost surely, 2^3831686 is an apocalyptic number.

3831686 is a deficient number, since it is larger than the sum of its proper divisors (1915846).

3831686 is a wasteful number, since it uses less digits than its factorization.

3831686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915845.

The product of its digits is 20736, while the sum is 35.

The square root of 3831686 is about 1957.4692845611. The cubic root of 3831686 is about 156.4816093691.

The spelling of 3831686 in words is "three million, eight hundred thirty-one thousand, six hundred eighty-six".