4028686 has 8 divisors (see below), whose sum is σ = 6066144. Its totient is φ = 2006640.

The previous prime is 4028683. The next prime is 4028693. The reversal of 4028686 is 6868204.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028681) 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 in 3 ways as a sum of consecutive naturals, for example, 3175 + ... + 4258.

It is an arithmetic number, because the mean of its divisors is an integer number (758268).

Almost surely, 2^4028686 is an apocalyptic number.

4028686 is a deficient number, since it is larger than the sum of its proper divisors (2037458).

4028686 is a wasteful number, since it uses less digits than its factorization.

4028686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7706.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 4028686 is about 2007.1586882955. The cubic root of 4028686 is about 159.1186698964.

The spelling of 4028686 in words is "four million, twenty-eight thousand, six hundred eighty-six".