2686857 has 8 divisors (see below), whose sum is σ = 3599040. Its totient is φ = 1782960.

The previous prime is 2686841. The next prime is 2686861. The reversal of 2686857 is 7586862.

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

It is not a de Polignac number, because 2686857 - 2⁴ = 2686841 is a prime.

2686857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2686897) 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 7 ways as a sum of consecutive naturals, for example, 1269 + ... + 2642.

It is an arithmetic number, because the mean of its divisors is an integer number (449880).

2^2686857 is an apocalyptic number.

It is an amenable number.

2686857 is a deficient number, since it is larger than the sum of its proper divisors (912183).

2686857 is a wasteful number, since it uses less digits than its factorization.

2686857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4143.

The product of its digits is 161280, while the sum is 42.

The square root of 2686857 is about 1639.1635061823. The cubic root of 2686857 is about 139.0213551718.

The spelling of 2686857 in words is "two million, six hundred eighty-six thousand, eight hundred fifty-seven".