1806685086 has 16 divisors (see below), whose sum is σ = 3613889664. Its totient is φ = 602141784.

The previous prime is 1806685057. The next prime is 1806685087. The reversal of 1806685086 is 6805866081.

It is a happy number.

It is a super-2 number, since 2×1806685086² = 6528221999949654792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806685087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34951 + ... + 69533.

It is an arithmetic number, because the mean of its divisors is an integer number (225868104).

Almost surely, 2^1806685086 is an apocalyptic number.

1806685086 is an abundant number, since it is smaller than the sum of its proper divisors (1807204578).

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

1806685086 is a wasteful number, since it uses less digits than its factorization.

1806685086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43295.

The product of its (nonzero) digits is 552960, while the sum is 48.

The square root of 1806685086 is about 42505.1183506175. The cubic root of 1806685086 is about 1217.9444661790.

The spelling of 1806685086 in words is "one billion, eight hundred six million, six hundred eighty-five thousand, eighty-six".