1681760 has 48 divisors (see below), whose sum is σ = 4154976. Its totient is φ = 642048.

The previous prime is 1681723. The next prime is 1681787. The reversal of 1681760 is 671861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3452 + ... + 3908.

It is an arithmetic number, because the mean of its divisors is an integer number (86562).

2^1681760 is an apocalyptic number.

1681760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1681760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2077488).

1681760 is an abundant number, since it is smaller than the sum of its proper divisors (2473216).

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

1681760 is a wasteful number, since it uses less digits than its factorization.

1681760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1681760 is about 1296.8268966982. The cubic root of 1681760 is about 118.9199376728.

The spelling of 1681760 in words is "one million, six hundred eighty-one thousand, seven hundred sixty".