3928686 has 8 divisors (see below), whose sum is σ = 7857384. Its totient is φ = 1309560.

The previous prime is 3928681. The next prime is 3928703. The reversal of 3928686 is 6868293.

It is a sphenic number, since it is the product of 3 distinct primes.

3928686 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928681) 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, 327385 + ... + 327396.

It is an arithmetic number, because the mean of its divisors is an integer number (982173).

Almost surely, 2^3928686 is an apocalyptic number.

3928686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3928686 is a wasteful number, since it uses less digits than its factorization.

3928686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654786.

The product of its digits is 124416, while the sum is 42.

The square root of 3928686 is about 1982.0913197933. The cubic root of 3928686 is about 157.7910767442.

The spelling of 3928686 in words is "three million, nine hundred twenty-eight thousand, six hundred eighty-six".