2081686 has 16 divisors (see below), whose sum is σ = 3223008. Its totient is φ = 1008000.

The previous prime is 2081671. The next prime is 2081687. The reversal of 2081686 is 6861802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081687) 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, 13711 + ... + 13861.

It is an arithmetic number, because the mean of its divisors is an integer number (201438).

2^2081686 is an apocalyptic number.

2081686 is a deficient number, since it is larger than the sum of its proper divisors (1141322).

2081686 is a wasteful number, since it uses less digits than its factorization.

2081686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327.

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

The square root of 2081686 is about 1442.8049071167. The cubic root of 2081686 is about 127.6845667337.

It can be divided in two parts, 20816 and 86, that added together give a palindrome (20902).

The spelling of 2081686 in words is "two million, eighty-one thousand, six hundred eighty-six".