1681338 has 8 divisors (see below), whose sum is σ = 3362688. Its totient is φ = 560444.

The previous prime is 1681321. The next prime is 1681349. The reversal of 1681338 is 8331861.

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

1681338 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 140106 + ... + 140117.

It is an arithmetic number, because the mean of its divisors is an integer number (420336).

2^1681338 is an apocalyptic number.

1681338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1681338 is a wasteful number, since it uses less digits than its factorization.

1681338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280228.

The product of its digits is 3456, while the sum is 30.

The square root of 1681338 is about 1296.6641816600. The cubic root of 1681338 is about 118.9099900758.

The spelling of 1681338 in words is "one million, six hundred eighty-one thousand, three hundred thirty-eight".