1681836 has 24 divisors (see below), whose sum is σ = 4226544. Its totient is φ = 517440.

The previous prime is 1681817. The next prime is 1681837. The reversal of 1681836 is 6381861.

It is a junction number, because it is equal to n+sod(n) for n = 1681797 and 1681806.

It is not an unprimeable number, because it can be changed into a prime (1681837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5235 + ... + 5546.

It is an arithmetic number, because the mean of its divisors is an integer number (176106).

2^1681836 is an apocalyptic number.

It is an amenable number.

1681836 is an abundant number, since it is smaller than the sum of its proper divisors (2544708).

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

1681836 is a wasteful number, since it uses less digits than its factorization.

1681836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10801 (or 10799 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 1681836 is about 1296.8561986589. The cubic root of 1681836 is about 118.9217290063.

The spelling of 1681836 in words is "one million, six hundred eighty-one thousand, eight hundred thirty-six".