1806286 has 4 divisors (see below), whose sum is σ = 2709432. Its totient is φ = 903142.

The previous prime is 1806281. The next prime is 1806313. The reversal of 1806286 is 6826081.

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

It is a super-2 number, since 2×1806286² = 6525338227592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451570 + ... + 451573.

It is an arithmetic number, because the mean of its divisors is an integer number (677358).

2^1806286 is an apocalyptic number.

1806286 is a deficient number, since it is larger than the sum of its proper divisors (903146).

1806286 is an equidigital number, since it uses as much as digits as its factorization.

1806286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903145.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1806286 is about 1343.9813986808. The cubic root of 1806286 is about 121.7854780677.

The spelling of 1806286 in words is "one million, eight hundred six thousand, two hundred eighty-six".