1806686 has 8 divisors (see below), whose sum is σ = 3097200. Its totient is φ = 774288.

The previous prime is 1806683. The next prime is 1806689. The reversal of 1806686 is 6866081.

It is an interprime number because it is at equal distance from previous prime (1806683) and next prime (1806689).

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

It is a super-2 number, since 2×1806686² = 6528228605192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806683) 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, 64511 + ... + 64538.

It is an arithmetic number, because the mean of its divisors is an integer number (387150).

2^1806686 is an apocalyptic number.

1806686 is a deficient number, since it is larger than the sum of its proper divisors (1290514).

1806686 is a wasteful number, since it uses less digits than its factorization.

1806686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129058.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1806686 is about 1344.1302020266. The cubic root of 1806686 is about 121.7944671565.

The spelling of 1806686 in words is "one million, eight hundred six thousand, six hundred eighty-six".